Lord Kṛṣṇa is so kind to the fallen souls that He personally incarnates Himself amongst the different kinds of living entities and takes part with them in daily activities. Any historical fact old or new which has a connection with the activities of the Lord is to be understood as a transcendental narration of the Lord. Without Kṛṣṇa, all the supplementary literatures like the Purāṇas and Mahābhārata are simply stories or historical facts. But with Kṛṣṇa they become transcendental, and when we hear of them we at once become transcendentally related with the Lord. Śrīmad-Bhāgavatam is also a Purāṇa, but the special significance of this Purāṇa is that the activities of the Lord are central and not just supplementary historical facts. Śrīmad-Bhāgavatam is thus recommended by Lord Śrī Caitanya Mahāprabhu as the spotless Purāṇa. There is a class of less intelligent devotees of the Bhāgavata Purāṇa who desire to relish at once the activities of the Lord narrated in the Tenth Canto without first understanding the primary cantos.
(Srimad Bhagavatam----1:7:12----purport).

Although Kṛṣṇa is manifested before Arjuna in His universal form, Arjuna remembers his friendly relationship with Kṛṣṇa and is therefore asking pardon and requesting Kṛṣṇa to excuse him for the many informal gestures which arise out of friendship. He is admitting that formerly he did not know that Kṛṣṇa could assume such a universal form, although Kṛṣṇa explained it as his intimate friend. Arjuna did not know how many times he may have dishonored Kṛṣṇa by addressing Him "O my friend," "O Kṛṣṇa," "O Yādava," etc., without acknowledging His opulence. But Kṛṣṇa is so kind and merciful that in spite of such opulence He played with Arjuna as a friend. Such is the transcendental loving reciprocation between the devotee and the Lord. The relationship between the living entity and Kṛṣṇa is fixed eternally; it cannot be forgotten, as we can see from the behavior of Arjuna. Although Arjuna has seen the opulence in the universal form, he cannot forget his friendly relationship with Kṛṣṇa.
(Bhagavad-Gita----11:41-42----purport).

It is clearly stated here that the material world is not created by the personal will of the Supreme Lord; it is created by His external energy because the living entities want to enjoy it. This material world is not created for those who do not want to enjoy sense gratification, who constantly remain in transcendental loving service and who are eternally Kṛṣṇa conscious. For them, the spiritual world is eternally existing, and they enjoy there. Elsewhere in the Śrīmad-Bhāgavatam it is stated that for those who have taken shelter of the lotus feet of the Supreme Personality of Godhead, this material world is useless; because this material world is full of danger at every step, it is not meant for the devotees but for living entities who want to lord it over the material energy at their own risk. Kṛṣṇa is so kind that He allows the sense-enjoying living entities a separate world created by Him to enjoy as they like, yet at the same time He appears in His personal form. The Lord unwillingly creates this material world, but He descends in His personal form or sends one of His reliable sons or a servant or a reliable author like Vyāsadeva to give instruction. He Himself also instructs in His speeches of Bhagavad-gītā. This propaganda work goes on side by side with the creation to convince the misguided living entities who are rotting in this material world to come back to Him and surrender unto Him. Therefore the last instruction of Bhagavad-gītā is this: "Give up all your manufactured engagements in the material world and just surrender unto Me. I shall protect you from all sinful reactions."
(Srimad Bhagavatam----3:21:20----purport).

The system of bhakti-yoga described by Queen Sunīti to her son is the standard way of God realization. Everyone can continue in his constitutional occupational duties and at the same time keep the Supreme Personality of Godhead within his heart. This was also instructed by the Lord Himself to Arjuna in Bhagavad-gītā: "Go on fighting, but keep Me within your mind." That should be the motto of every honest person seeking perfection in Kṛṣṇa consciousness. In this connection, Queen Sunīti advised her son that the Supreme Personality of Godhead is known as bhṛtya-vatsala, which indicates that He is very kind to His devotees. She said, "You came to me crying, having been insulted by your stepmother, but I am unable to do any good for you. But Kṛṣṇa is so kind to His devotees that if you go to Him, then the combined kindness of millions of mothers like me will be surpassed by His affectionate and tender dealings. When everyone else fails to mitigate one's misery, Kṛṣṇa is able to help the devotee." Queen Sunīti also stressed that the process of approaching the Supreme Personality of Godhead is not easy, but is sought after by great sages who are very advanced in spiritual realization. Queen Sunīti also indicated by her instruction that Dhruva Mahārāja was only a small child, five years old, and it was not possible for him to purify himself by the way of karma-kāṇḍa. But by the process of bhakti-yoga, even a child less than five years old, or anyone of any age, can be purified. That is the special significance of bhakti-yoga. Therefore she advised him not to accept worship of the demigods or any other process, but simply to take to the Supreme Personality of Godhead, and the result would be all perfection. As soon as one places the Supreme Personality of Godhead within one's heart, everything becomes easy and successful.
(Srimad Bhagavatam----4:8:22----purport).

There have been many historical incidents in which the Lord killed a demon, but the demon attained a higher position by the mercy of the Lord. Pūtanā is an example. Pūtanā's purpose was to kill Kṛṣṇa. Aho bakī yaṁ stana-kāla-kūṭam. She approached the house of Nanda Mahārāja with the purpose of killing Kṛṣṇa by smearing poison on her breast, yet when she was killed she attained the highest position, achieving the status of Kṛṣṇa's mother. Kṛṣṇa is so kind and impartial that because he sucked Pūtanā's breast, He immediately accepted her as His mother. This superfluous activity of killing Pūtanā did not diminish the Lord's impartiality. He is suhṛdaṁ sarva-bhūtānām, the friend of everyone. Therefore partiality cannot apply to the character of the Supreme Personality of Godhead, who always maintains His position as the supreme controller. The Lord killed Pūtanā as an enemy, but because of His being the supreme controller, she attained an exalted position as His mother. Śrīla Madhva Muni therefore remarks, kāle kāla-viṣaye 'pīśitā. dehādi-kāraṇatvāt surānīkam iva sthitaṁ sattvam. Ordinarily a murderer is hanged, and in the Manu-saṁhitā it is said that a king bestows mercy upon a murderer by killing him, thus saving him from various kinds of suffering. Because of his sinful activities, such a murderer is killed by the mercy of the king. Kṛṣṇa, the supreme judge, deals with matters in a similar way because He is the supreme controller. The conclusion, therefore, is that the Lord is always impartial and always very kind to all living entities.
(Srimad Bhagavatam----7:1:12----purport).

In Bhagavad-gītā (9.26) Kṛṣṇa says:
patraṁ puṣpaṁ phalaṁ toyaṁ
yo me bhaktyā prayacchati
tad ahaṁ bhakty-upahṛtam
aśnāmi prayatātmanaḥ
Kṛṣṇa is so kind that if anyone offers Him a leaf, a fruit, a flower or some water, He will immediately accept it. The only condition is that these things should be offered with bhakti (yo me bhaktyā prayacchati). Otherwise, if one is puffed up with false prestige, thinking, "I have so much opulence, and I am giving something to Kṛṣṇa," one's offering will not be accepted by Kṛṣṇa. The fruit vendor, although a woman belonging to the poor aborigine class, dealt with Kṛṣṇa with great affection, saying, "Kṛṣṇa, You have come to me to take some fruit in exchange for grains. All the grains have fallen, but still You may take whatever You like." Thus she filled Kṛṣṇa's palms with whatever fruits He could carry. In exchange, Kṛṣṇa filled her whole basket with jewels and gold.
(Srimad Bhagavatam----10:11:11----purport).

An intelligent person gives up the company of those who are attached to women and bereft of Kṛṣṇa consciousness. One should be free from all kinds of material attachment and should take full shelter under the lotus feet of Kṛṣṇa. Kṛṣṇa is very kind to His devotees. He is always grateful, and He never forgets the service of a devotee. He is also completely opulent and all-powerful. Why, then, should one take shelter of a demigod and leave Lord Kṛṣṇa's shelter? If one worships a demigod and leaves Kṛṣṇa, he must be considered the lowest fool.
(Sri Caitanya Caritamrta----2:22:95----purport).

Mahā-prasādam is nondifferent from Kṛṣṇa. Therefore, instead of eating mahā-prasādam, one should honor it. It is said here, karilā vandana, "he offered prayers." When taking mahā-prasādam, one should not consider the food ordinary preparations. Prasāda means favor. One should consider mahā-prasādam a favor of Kṛṣṇa. As stated by Śrīla Bhaktivinoda Ṭhākura, kṛṣṇa baḍa dayāmaya karibāre jihvā jaya svaprasāda-anna dilā bhāi. Kṛṣṇa is very kind. In this material world we are all very much attached to tasting various types of food. Therefore, Kṛṣṇa eats many nice varieties of food and offers the food back to the devotees, so that not only are one's demands for various tastes satisfied, but by eating prasādam one makes advancement in spiritual life. Therefore, we should never consider ordinary food on an equal level with mahā-prasādam.
(Sri Caitanya Caritamrta----3:11:20----purport).

This is the position of all karmīs, including those who act piously and those who act impiously. On this planet we find many businessmen, politicians and others who are simply interested in material happiness. They attempt to earn money by all means, not considering whether such means are pious or impious. Such people are called karmīs, or gross materialists. Among the karmīs are some vikarmīs, people who act without the guidance of Vedic knowledge. Those who act on the basis of Vedic knowledge perform sacrifices for the satisfaction of Lord Viṣṇu and to receive benedictions from Him. In this way they are elevated to higher planetary systems. Such karmīs are superior to the vikarmīs, for they are faithful to the directions of the Vedas and are certainly dear to Kṛṣṇa. In Bhagavad-gītā (4.11), Kṛṣṇa says: ye yathā māṁ prapadyante tāṁs tathaiva bhajāmy aham. "In whatever way one surrenders unto Me, I reward him accordingly." Kṛṣṇa is so kind that He fulfilled the desires of the karmīs and jñānīs, not to speak of the bhaktas. Although the karmīs are sometimes elevated to higher planetary systems, as long as they remain attached to fruitive activities they must accept new material bodies after death. If one acts piously, he can attain a new body among the demigods in the higher planetary systems, or he may attain some other position in which he can enjoy a higher standard of material happiness. On the other hand, those who are engaged in impious activities are degraded and take birth as animals, trees and plants. Thus those fruitive actors who do not care for the Vedic directions (vikarmīs) are not appreciated by learned saintly persons.
(Nectar of Instruction).

When all the cowherd men had very attentively heard the statements of Gargācārya through Nanda Mahārāja, they better appreciated the wonderful activities of Kṛṣṇa and became very jubilant and satisfied. They began to praise Nanda Mahārāja, because by consulting him their doubts about Kṛṣṇa were cleared. They said, "Let Kṛṣṇa, who is so kind, beautiful and merciful, protect us. When angry Indra sent torrents of rain, accompanied by showers of ice blocks and high wind, He immediately took compassion upon us and saved us and our families, cows and valuable possessions by picking up Govardhana Hill, just as a child picks up a mushroom. He saved us so wonderfully. May He continue to glance mercifully over us and our cows. May we live peacefully under the protection of wonderful Kṛṣṇa."
(Krsna Book).

The fifth excellence of Lord Kṛṣṇa's appearance is that He established the most excellent of all religious principles by His one statement in the Bhagavad-gītā that simply by surrendering unto Him one can discharge all the principles of religious rites. In the Vedic literature there are twenty kinds of religious principles mentioned, and each of them is described in different śāstras. But Lord Kṛṣṇa is so kind to the fallen conditioned souls of this age that He personally appeared and asked everyone to give up all kinds of religious rites and simply surrender unto Him. It is said that this Age of Kali is three-fourths devoid of religious principles. Hardly one fourth of the principles of religion are still observed in this age. But by the mercy of Lord Kṛṣṇa, not only has this void of Kali-yuga been completely filled, but the religious process has been made so easy that simply by rendering transcendental loving service unto Lord Kṛṣṇa by chanting His holy names, Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare / Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, one can achieve the highest result of religion, namely, being transferred to the highest planet within the spiritual world, Goloka Vṛndāvana. Considering all this, one can immediately appreciate the benefit of Lord Kṛṣṇa's appearance on the earth and understand that His giving relief to the people of the world by His appearance was not at all extraordinary.
(Krsna Book).