(CC Madhya 20.127-136): Lord Chaitanya Mahaprabhu, the Supreme Personality of Godhead, said to Sanatana Goswami: "The following example may be given. Once a learned astrologer came to the house of a poor man and, seeing his distressed condition, questioned him. ""The astrologer asked, 'Why are you unhappy? Your father was very wealthy, but he did not disclose his wealth to you because he died elsewhere?' "Just as the words of the astrologer Sarvajna gave news of the poor man's treasure, Vedic literatures advise one about Krishna consciousness when one is inquisitive to know why he is in a distressed material condition. "By the words of the astrologer, the poor man's connection with the treasure was established. Similarly, Vedic literature advises us that our real connection is with Sri Krishna, the Supreme Personality of Godhead. "Although being assured of his father's treasure, the poor man cannot acquire this treasure by such knowledge alone. Therefore the astrologer had to inform him of the means whereby he could actually find the treasure. "The astrologer said, 'The treasure is in this place, but if you dig toward the southern side, the wasps and drones will rise, and you will not get your treasure. " 'If you dig on the western side, there is a ghost who will create such a disturbance that your hands will not even touch the treasure. " 'If you dig on the northern side, there is a big black snake that will devour you if you attempt to dig up the treasure. " 'However, if you dig up a small quantity of dirt on the eastern side, your hands will immediately touch the pot of treasure.'
"Revealed scriptures conclude that one should give up fruitive activity, speculative knowledge and the mystic yoga system and instead take to devotional service, by which Krishna can be fully satisfied. 
hare krishna thank u very much....
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Lord Chaitanya is the supreme lord, but he is the hidden incarnation, thats y in India many ppl. dont know of Lord Chaitanya though they might know of Lord Krishna or Lord Sri Ramachandra.
There are unlimited evidences of how Lord Sri Gauranga Mahaprabhu is the supreme Lord.
For example, Atharva veda, thrtiya kanda, brahma vibaga states that.............
Towards the end of the period between four-thousand to five thousand years in Kali-yuga, I will descend on the earth as Gauranga, a golden-complexioned saintly brahmana in a place by the Ganges' shore and later become the crest-jewel of all sannyasis, exhibiting all My transcendental qualities including supreme renunciation and complete detachment from material desires. In the form of Lord Gauranga, I will display all the thirty-two bodily symptoms of a great personality with my arms extending to my knees. I will become my own devotee, very advanced in bhakti-yoga and teach the worship of Lord Krsna (Myself) by the chanting of My own holy names and relishing the mellows of My own devotional service. At that time only My most confidential devotees will be able to understand Me.
In the Svestesvara upanishad (3.12) of Yajur Veda it is mentioned that,
The Supreme Personality of Godhead is Mahaprabhu [Lord Caitanya], who disseminates transcendental enlightenment. Just to be in touch with Him is to be in contact with the indestructible brahmajyoti.
In the age of Kali, intelligent persons perform congregational chanting to worship the incarnation of Godhead who constantly sings the name of Krsna. Although His complexion is not blackish, He is Krsna Himself. He is accompanied by His associates, servants, weapons and confidential companions. (Srimad-Bhagavatam 11.5.32, Karabhajana Muni speaks to King Nimi)
The Supreme Personality of Godhead will come in a golden form, full of peace, and a beautiful long neck. He will be surrounded by many saintly devotees. (Agni Purana)
O sage whose wealth is austerity, in the Kali-yuga everyone will see My form as a sannyasi, a form filled with tears of bliss and bodily hairs standing erect. (Bhavisya Purana)
In the first sandhya of the Kali-yuga I will reveal My eternal golden form by the Ganges' shore on the earth. (Brahma Purana)
The Supreme Personality of Godhead will again appear in this world. His name will be Sri Krsna Caitanya and He will spread the chanting of the Lord's holy names. (Devi Purana)
The Supreme Personality of Godhead, Who enjoyed glorious pastimes with Sridama, Dama, and other gopa boys in Vrndavana forest, and Whose eyes glanced at the gopis' breasts, will again come to this world to reveal the nature of pure spiritual love. At that time His name will be Caitanya. (Garuda Purana)
The Supreme Personality of Godhead, Who enjoyed pastimes with the gopis, Who day and night filled the people of Vrndavana with happiness, Who killed Kamsa, and Who in the war between the Kauravas made friendship with the Pandavas, will come again to the earth. Of this there is no doubt. His arm decorated with a bamboo danda, He will be a sannyasi and his name will be Caitanya. (Garuda Purana)
To deliver the conditioned souls burning in the trouble of Kali-yuga, in the first sandhya of that age I will take birth among the Brahmanas. (Garuda Purana)
In My original spiritual form, perfect and complete, I will become the son of Sacidevi in Navadvipa-Mayapura at the beginning of Kali-yuga. (Garuda Purana)
In the first sandhya of Kali-yuga, the Supreme Personality of Godhead will assume a golden form. First He will be the husband of Laksmi, and then He will be a sannyasi who stays near Lord Jagannatha at Puri. (Garuda Purana)
The Supreme Person will appear in the first part of the age of Kali. He will appear in the home of a brahmana, to save the embodied conditioned souls burning in the troubles of Kali-yuga. (Kurma Purana)
Thou art the cause of all causes. Thou art a Brahma (in the form of Pranava), thou art Swaha; thou art the bearer of the Danda, thy head is bald, and thou art he who has his words, deeds and thoughts under control. (Mahabharata, Moksa dharma 12.112)
suvarna-varno hemango
varangas candanangadi
sannyasa-krc chamah santo
nistha-santi-parayanah..............Vishnu Sahasranama v. 92
In the Kali-yuga, I will leave Goloka and to save the people of the world, I will become the handsome and playful Lord Gauranga. (Markandeya Purana)...........This is too direct...JAI!!!!
In the age of Kali, I shall advent where the three rivers meet. I shall have a shaven head. I shall have a golden complexion. I will be very kind and always chant the holy name of Krsna. (Matsya Purana)
O divija (demigods), please come and advent as devotees on this earth in the age of Kali. I will incarnate as the son of Saci to inaugurate the congregational chanting of the name of Krsna. (Narada Purana)
O brahmana, in the age of Kali I will appear disguised as a devotee of the Lord and I will deliver all the worlds. O demigods, in the Kali-yuga please take birth as devotees on the earth. I will appear as the son of Saci in the Kali-yuga to start the sankirtana movement. (Narada Purana)
The Supreme Personality of Godhead, Who in the Satya-yuga appeared as a half-man half-lion to cure a terrible disease that has ravaged the daityas, and Who in Treta-yuga appeared as a person named Rama, a person who defeated the ten-headed demon Ravana, and Who in the Dvapara-yuga removed the earth's burden and protected the gopa people of Vraja-pura, will appear again in the Kali-yuga. His form will be golden, He will delight in chanting the Lord's holy names, and His name will Caitanya. (Nrsimha Purana).....Lord Chaitanya is the yuga avatar........Haribol!!!!!!!
In the first sandhya of Kali-yuga I will appear on the earth in a beautiful place by the Ganges' shore. I will be the son of Sacidevi and My complexion will be golden. (Padma Purana)
The Supreme Personality of Godhead, Who is filled with bliss, Who rescues the devotees from a host of calamities, and Who is the master of yoga and the object of the yogis' meditation, will appear in His transcendental form and will be known by the name Caitanya. (Padma Purana)
Inside black and outside golden and accompanied by His associates and weapons, I shall appear in the womb of Saci. I will seemingly act as a human being because of the cover of My maya potency. (Skanda Purana)
O Narada, appearing from the womb of Sacidevi [an incarnation of Krsna's mother Yasoda], I shall deliver the people of Kali-yuga, who will be covered by deep ignorance and thus devoid of good behavior. (Vamana Purana)
I shall come as the best of the brahmanas. I will exhibit many pastimes in the form of a devotee. I shall deliver the people of the world. (Varaha Purana)
n Kali-yuga I shall appear in a golden form with shaved head and a tall body. I shall be merciful to people engaged in sankirtana on the bank of the River Ganges. When the sankirtana movement is inaugurated, I shall descend as the son of Sacidevi. (Vayu Purana)
In the age of Kali-yuga, I shall come in a place on the bank of the Ganges. I will be very pure, have a fair complexion, and be very tall and chant the holy names of Krsna. (Vayu Purana)
I shall advent in the month of Phalguna, when the star Phalguni is conjoined with the full moon. I shall incarnate in a golden complexion in the womb of Saci and Purandara Misra.
I will be born in the city of Navadvipa, on the Ganges' shore, in a brahmana's family. I shall take the renounced order of life [sannyasa] and show kindness to the people in general and engage them in Bhakti. I will be known as Sri Krsna Caitanya.
All of you should follow My order and deliver the people of the world. I shall appear as a brahmana. I shall make this earth fearless. (Vayu Purana)
I, the Supreme Brahman, sometimes appear as a sannyasi. I am preaching the Hari-bhakti which destroys the sins of people in Kali-yuga. (an Upapurana)
From the Ananta Samhita,
To show mercy to the people and give them devotional service, the Supreme Personality of Godhead will appear in a brahmana's home in Navadvipa by the Ganges' shore. The Supreme Person, Sri Krsna Himself, who is the life of Srimati Radharani, and is the Lord of the universe in creation, maintenance, and annihilation, appears as Gaura, O Mahesvari.
In Kali-yuga, I will descend to the earth with My associates. In Navadvipa, which is surrounded by the Ganges, I will take birth in Sacidevi's womb.
They who are bewildered by My illusory potency will not understand the great secret of the appearance in this world of Me in My personal form, in My form as the incarnation of devotion, in My form as the incarnation of a devotee, in My form bearing the name of a devotee, in My form as a devotee, and in My form as the giver of devotional service.
This secret is not to be revealed to them. Only the saintly, pure, renounced devotees, diligently engaged in My devotional service, will be able to understand Me in these five forms.
My dear male and female associates, headed by Sridama and Subala, who came to this world at the time of My advent as Lord Krsna, will come again during the Kali-yuga.
The gopas will become the sixty-four mahantas and the twelve gopalas. To establish the truth of religion, I will enjoy many pastimes with them.
In this way I will again reveal the path of devotional service, which has been destroyed in the course of time. My sons should also descend to the earth, assume the forms of devotees, and, by My order, also work to re-establish the principles of true religion.
At this time My names will be: Krsna Caitanya, Gauranga, Gauracandra, Sacisuta, Mahaprabhu, Gaura and Gaurahari. Chanting these names will bring devotion to Me.
The golden Goddess Radha is known by the name Gauri and the dark Lord Krsna is known by the name Hari. Aware that both of them have combined, the wise call Him as Gaurahari."
navadvipe tu tah sakhyo
bhakta-rupa-dharah priye
ekangam sri-gaura-harim
sevante satatam muda
"O beloved, assuming the forms of devotees the gopis will also take birth in Navadvipa. With great happiness they will again and again serve Lord Gaurahari, who is Radha and Krsna combined in a single form."
sri-mahadeva uvaca
gaurangam sac-cid-anandam, sarva-karana-karanam
vaca gadgadayanantam, tustava dharani-dharah
Lord Anantadeva, the upholder of the whole universe then with a chocked voice full of ecstasy tried to satisfy the Supreme Personality of Godhead, Lord Sri Gauranga Mahaprabhu, the Supreme Cause of all Causes who possesses a transcendental eternal form of truth, knowledge and bliss.
vrndavane navadvipe, bheda-buddhis ca yo narah
tam eva radhika-krsne, sri-gaurange paratmani
mac-chala-pata-nirbhinna-dehah so 'pi naradhamah
pacyate narake ghore, yavad ahuta-samplavam
Lord Shiva said: "With my trident I will cut into pieces anyone who thinks that Vrindavana and Navadvipa are different, or that Radha-Krsna and Gauranga are different, or that Lord Gauranga is not the Supreme Personality of Godhead. Such a person is most degraded among human beings. He or she will burn in a terrible hell until the time when the universe is flooded with water."
vistaran me nigaditah, sruto yah krsna isvarah
visvadau gaura-kantitvat, gaurangam vaisnavah viduh
Please hear attentively, I will describe in detail this most confidential secret. The Supreme Isvara or Controller Lord Krishna who is the origin of everything is known and worshiped by the learned Vaishnava devotees as Lord Gauranga, when He accepts the golden complexion of Srimati Radhika.
paratmane namas tasmai, sarva-karana-hetave
adi-devaya gauraya, sac-cid-ananda-rupine
I offer my prostrated obeisances to Adideva, the Supreme Lord Sri Gauranga Mahaprabhu who is the ultimate and original cause of all causes, the Paratma or Supersoul of all living entities and who possesses a transcendental eternal form of truth, knowledge and bliss.
gopi-sangam na capnoti, sri-gaura-caranad rte
tasmat tvam sarva-bhavena, sri-gauram bhaja sarvada
And to achieve the service and association of the gopis of Vrindavana the only way is to worship the lotus feet of Lord Gauranga and chant His name. Therefore Parvati, you should worship Lord Gauranga and chant His name constantly and with sarva-bhava, full surrender, giving everything to Him.
gauranga-caranambhoja-makaranda-madhuvratah
sadhanena vina radham, krsnam prapsyanti niscitam
The person who is like a transcendental honeybee relishing the supreme ambrosial nectar (makaranda) emanating from the divine lotus feet of Lord Gauranga Mahaprabhu will most certainly without a doubt attain Their Lordships Sri Sri Radha Krishna even without performing any sadhana-bhakti practice of bhakti-yoga.
radhika-vallabhah krsno, bhaktanam priya-kamyaya
srimad-gauranga-rupena, navadvipe virajate
The Supreme Personality of Godhead Lord Krishna who is most dear to His Supreme consort Srimati Radharani is situated in Navadvipa in His transcendental combined form of Srimad Gauranga to fulfil the innermost desires of His most intimate devotees. (From Ananta-samhita)
sa tata paramo devah
sri-saci-devi-nandanah
dvi-netro dvi-bhujo gauras
tapta-jambunada-prabhah
O child, at that time the Supreme Personality of Godhead has two eyes, two arms, and a fair complexion splendid as molten gold. He is the son of Sri Saci-devi. (Satvata tantra 5.41)
dhyana-yoga-kriyah sarvah
sa samhrtya daya-parah
svakiye yasasi sthapya
ganta vaikuntham uttamam
Removing the meditation, yoga, and pious deeds (of the previous ages), the merciful Lord will put His own glory in their place. Then He will return to the highest Vaikuntha world. (Satvata tantra 5.42)
tasmin yajanti sri-krsnam
caitanyakhyam jagad-gurum
pita-varnam tantra-mantrair
namnam sodasabhih samam
With sixteen holy names of the Lord and with mantras from the Tantras [Pancaratras] the people in that age will worship the Lord of the universes, whose complexion is fair and who is named Sri Krsna Caitanya. (Satvata tantra 5.43)
athavaham dhara-dhamni
bhutva mad-bhakta-rupa-dhrk
mayayam ca bhavisyami
kalau sankirtanagame
Sometimes I personally appear on the surface of the world in the garb of a devotee. Specifically, I appear as the son of Saci in Kali-yuga to start the sankirtana movement. (Brahma-yamala tantra)
gaurangam gaura-diptangam
pathet stotram krtanjalih
nanda-gopa-sutam caiva
namasyami gadagrajam
With great devotion and folded hands, one should recite the following prayer before Lord Gauranga, whose limbs are as effulgent as molten gold: 'I offer my respectful obeisances to Lord Gauranga-Krsna, the son of the Nanda Maharaja and the elder brother of Gada. (Brahma-yamala tantra)
kalau prathama-sandhyayam
hari-nama-pradayakah
bhavisyati navadvipe
saci-garbhe janardanah
In the first sandhya of Kali-yuga, Lord Krsna will appear in Navadvipa, in Sacidevi's womb. In that incarnation He will teach the chanting of Lord Hari's holy names.
Lord Krsna descends to the world in many different forms. However in Kali-yuga, His incarnation is hidden. At that time He appears disguised as a sannyasi. (Jaimini-bharata)
Then Sri Radha said to Lord Krsna: 'O beloved, please hear My words. I yearn to become one with you. Please show a form where You and I embrace and Our two bodies become one, a form filled with the love I bear for You, a form filled with auspicious and blissful pastimes, a form that brings bliss to the heart, a form that unites Our two natures.'
Hearing His beloved's words, which were filled with joy and love, Lord Krsna passionately embraced Her. Then by the touch of His inconceivable potency Their two forms joined and became one, a single form endowed with Sri Radha's divine love and glorious splendor. In a dream Lord Krsna showed all this to Sri Radha. (Kapila tantra)
aham purno bhavisyami
yuga-sandhau visesatah
mayapure navadvipe
varam ekam saci-sutah
During the first sandhya of Kali-yuga I will descend, with all My powers and glories, to Mayapura in Navadvipa and become the son of Sacidevi. (Krsna-yamala tantra)
punya-ksetre navadvipe
bhavisyami saci-sutah
I shall appear in the holy land of Navadvipa as the son of Sacidevi. (Krsna-yamala tantra)
iti matva krpa-sindhur
amsena krpaya harih
prasanno bhakta-rupena
kalav avatarisyati
Thinking in this way, Lord Krsna, who is an ocean of mercy, mercifully decided to appear as a devotee in Kali-yuga. (Krsna-yamala tantra)
gauranga nada gambhirah
svanamamrta lalasah
dayaluh kirtana grahi
bhavisyati saci-sutah
Merciful Lord Gauranga, who has a deep voice, will appear as the son of Sacidevi. He is eager to taste the nectar of His own names and thus engages in chanting them. (Krsna-yamala tantra 64)
matva tvanmayam atmanam
pathan dvayaksaram ucyate
gata trapo madonmatto
gaja vad vicarisyati
He (Krsna) will consider Himself as You (Radha). In this mood He will loudly recite two syllables, krs-na, and being shamelessly intoxicated He will wander like an elephant. (Krsna-yamala tantra 65)
bhuvani prapte tu govindas
caitanyakhyo bhavisyati
ansena bhuvi yasyanti
tatra tat purvaparsada
When Lord Govinda appears on earth, He will be known as Caitanya. At that time His associates also appear on earth in their expansions. (Krsna-yamala tantra 66)
kalau purandarat sacyam
gaura-rupo vibhu smrtah
In Kali-yuga I will appear in a golden form as the son of Purandara and Sacidevi. (Urdhvamnaya tantra)
navadvipa-samam sthanam
sri-gauranga-samah prabhuh
krsna-prema-sama praptir
nasti durge kadacana
O Durga, no place in the creation is equal to Navadvipa, no master is as merciful as Lord Sri Gauranga, and no attainment in the whole world is equal to pure love for Krsna. (Urdhvamnaya tantra)
krsna-caitanya-namna ye
kirttayanti sakrnnarah
nanaparadha-muktas te
punanti sakalam jagat
A person who even once chants the name of Krsna Caitanya becomes free from all offenses and purifies the whole universe. (Visnu-yamala tantra)
kaleh prathama-sandhyayam
gaurango 'sau mahi-tale
bhagirathi-tate ramye
bhavisyati sanatanah
In the first sandhya of Kali-yuga, on the earth, by the beautiful shore of the Ganges, the Lord will appear in His eternal golden form. (Yoga-vasistha)
Wow, so many direct evidences :)
Just a point more i would like to share from personal experience:
Recently, I got to see a cigratte packet found in the hostel and on big letters it was written "SMOKIING CAUSES KILLING" and a picture of lungs was drawn, even though the smokers see it still they smoke........paschyann api na paschyati.
Similarly, there are innumerable evidences of how God exists (both scientific and vedic) and that Lord Chaitanya (Krishna) is the supreme Lord. Still some people because of misfortune dont understand that :(.
Moreover, I understand but still not able to practice bhakti properly. So, those whoever read this, please pray for my spiritual progress.
Your insignificant servant,
Chaitanya