To become absorbed in the transcendental name, quality, form and activities of the Supreme Person, Vāsudeva, means to change the temper of the mind from matter to absolute knowledge, which leads one to the path of absolute realization and thus frees one from the bondage of material contact and encagements in different material bodies.
Śrīla Jīva Gosvāmī Prabhupāda therefore comments on the words sarvatra sarvadā in the sense that the principles of bhakti-yoga, or devotional service to the Lord, are apt in all circumstances; i.e., bhakti-yoga is recommended in all the revealed scriptures, it is performed by all authorities, it is important in all places, it is useful in all causes and effects, etc. As far as all the revealed scriptures are concerned, he quotes from the Skanda Purāṇa on the topics of Brahmā and Nārada as follows:
saṁsāre 'smin mahā-ghore
janma-mṛtyu-samākule
pūjanaṁ vāsudevasya
tārakaṁ vādibhiḥ smṛtam
In the material world, which is full of darkness and dangers, combined with birth and death and full of different anxieties, the only way to get out of the great entanglement is to accept loving transcendental devotional service to Lord Vāsudeva. This is accepted by all classes of philosophers.
Śrīla Jīva Gosvāmī also quotes another common passage, which is found in three Purāṇas, namely the Padma Purāṇa, Skanda Purāṇa and Liṅga Purāṇa. It runs as follows:
āloḍya sarva-śāstrāni
vicārya ca punaḥ punaḥ
idam ekaṁ suniṣpannaṁ
dhyeyo nārāyaṇaḥ sadā
"By scrutinizingly reviewing all the revealed scriptures and judging them again and again, it is now concluded that Lord Nārāyaṇa is the Supreme Absolute Truth, and thus He alone should be worshiped."
(Srimad Bhagavatam----2:9:36----purport).

It is said in the Skanda Purāṇa:
yasya smṛtyā ca nāmoktyā
tapo-yajña-kriyādiṣu
nūnaṁ sampūrṇatām eti
sadyo vande tam acyutam
"I offer my obeisances unto Him, the infallible, because simply by either remembering Him or vibrating His holy name one can attain the perfection of all penances, sacrifices or fruitive activities, and this process can be universally followed."
(Srimad Bhagavatam----2:9:36----purport).

One need not be anxious to propitiate each and every demigod and goddess because the root of all of them is the Personality of Godhead. As by pouring water on the root of the tree one serves and enlivens all the branches and leaves, so by rendering service unto the Supreme Lord one automatically serves every god and goddess without extraneous effort. The Lord is all-pervading, and therefore service unto Him is also all-pervading. This fact is corroborated in the Skanda Purāṇa as follows:
arcite deva-deveśe
śaṅkha-cakra-gadā-dhare
arcitāḥ sarva-devāḥ syur
yataḥ sarva-gato hariḥ
When the Supreme Lord, the Personality of Godhead, who carries in His hands a conchshell, wheel, club and lotus flower, is worshiped, certainly all other demigods are worshiped automatically because Hari, the Personality of Godhead, is all-pervading.
(Srimad Bhagavatam----2:9:36----purport).

In his Bhakti-rasāmṛta-sindhu (1.2.101) Śrīla Rūpa Gosvāmī, quoting the Skanda Purāṇa, states:
śruti-smṛti-purāṇādi-
pañcarātra-vidhiṁ vinā
aikāntikī harer bhaktir
utpātāyaiva kalpate
(Brs. 1.2.101)
Human society must follow the instructions received from śruti and smṛti, Vedic literature. Practically applied in life this is worship of the Supreme Personality of Godhead according to the pāñcarātrika-vidhi. Every human being must advance his spiritual life and at the end return home, back to Godhead. Mahārāja Ṛṣabhadeva strictly followed all these principles. He remained an ideal gṛhastha and taught His sons how to become perfect in spiritual life. These are some examples of how He ruled the earth and completed His mission as an incarnation.
(Srimad Bhagavatam----5:4:8----purport).

Śrīla Madhvācārya explains that the words otaṁ protam refer to the cause of all causes. The Supreme Lord is both vertical and horizontal to the cosmic manifestation. This is confirmed by the following verse from the Skanda Purāṇa:
yathā kanthā-paṭāḥ sūtra
otāḥ protāś ca sa sthitāḥ
evaṁ viṣṇāv idaṁ viśvam
otaṁ protaṁ ca saṁsthitam
Like the two threads, horizontal and vertical, of which a quilt is manufactured, Lord Viṣṇu is situated as the vertical and horizontal cause of the cosmic manifestation.
(Srimad Bhagavatam----6:3:12----purport).

The conditioned soul has desires, and the Supreme Soul fulfills them, but the conditioned soul is unable to see the Supreme Soul. Thus Prajāpati Dakṣa offers his obeisances to the Supreme Soul, the Supersoul, even though unable to see Him. In this regard, Madhvācārya quotes the following verse from the Skanda Purāṇa:
yathā rājñaḥ priyatvaṁ tu
bhṛtyā vedena cātmanaḥ
tathā jīvo na yat-sakhyaṁ
vetti tasmai namo 'stu te
"As the various servants in the different departments of big establishments cannot see the supreme managing director under whom they are working, the conditioned souls cannot see the supreme friend sitting within their bodies. Let us therefore offer our respectful obeisances unto the Supreme, who is invisible to our material eyes."
(Srimad Bhagavatam----6:4:24----purport).

In the Skanda Purāṇa there is this description: upāyanaṁ daduḥ sarve vinā devān hiraṇyakaḥ. Hiraṇyakaśipu was so powerful that everyone but the three principal demigods—namely Lord Brahmā, Lord Śiva and Lord Viṣṇu—engaged in his service. Madhvācārya says, ādityā vasavo rudrās tri-vidhā hi surā yataḥ. There are three kinds of demigods—the Ādityas, the Vasus and the Rudras—beneath whom are the other demigods, like the Maruts and Sādhyas (marutaś caiva viśve ca sādhyāś caiva ca tad-gatāḥ). Therefore all the demigods are called tri-piṣṭapa, and the same word tri applies to Lord Brahmā, Lord Śiva and Lord Viṣṇu.
(Srimad Bhagavatam----7:4:13----purport).

Śrīla Jīva Gosvāmī, the great authority and philosopher in the line of Śrī Caitanya Mahāprabhu, has discussed the abode of Kṛṣṇa in his Kṛṣṇa-sandarbha. In the Bhagavad-gītā the Lord refers to "My abode." Śrīla Jīva Gosvāmī, examining the nature of Kṛṣṇa's abode, refers to the Skanda Purāṇa, which states:
yā yathā bhuvi vartante puryo bhagavataḥ priyāḥ
tās tathā santi vaikuṇṭhe tat-tal-līlārtham ādṛtāḥ
"The abodes of Godhead in the material world, such as Dvārakā, Mathurā and Gokula, are facsimiles representing the abodes of Godhead in the kingdom of God, Vaikuṇṭha-dhāma." The unlimited spiritual atmosphere of that Vaikuṇṭha-dhāma is far above and beyond the material cosmos.
(Sri Caitanya Caritamrta----1:5:18----purport).

The Skanda Purāṇa confirms, acintyāḥ khalu ye bhāvā na tāṁs tarkeṇa yojayet: "Matters inconceivable to a common man should not be a subject for argument."
(Sri Caitanya Caritamrta----1:5:41----purport).

Śrīla Jīva Gosvāmī, in his Kṛṣṇa-sandarbha, has described Śeṣa Nāga as follows: "Śrī Anantadeva has thousands of faces and is fully independent. Always ready to serve the Supreme Personality of Godhead, He waits upon Him constantly. Saṅkarṣaṇa is the first expansion of Vāsudeva, and because He appears by His own will, He is called svarāṭ, fully independent. He is therefore infinite and transcendental to all limits of time and space. He Himself appears as the thousand-headed Śeṣa." In the Skanda Purāṇa, in the Ayodhyā-māhātmya chapter, the demigod Indra requested Lord Śeṣa, who was standing before him as Lakṣmaṇa, "Please go to Your eternal abode, Viṣṇuloka, where Your expansion Śeṣa, with His serpentine hoods, is also present."
(Sri Caitanya Caritamrta----1:5:120----purport).

The temple of Bhuvaneśvara is situated about five to six miles from Bālakāṭīcaṭi. The temple of Lord Śiva is mentioned in the Skanda Purāṇa, in the narration about the Lord's garden and the one mango tree. A king named Kāśirāja wanted to fight with Lord Kṛṣṇa, and consequently he took shelter of Lord Śiva to acquire the power to fight the Lord. Being pleased with his worship, Lord Śiva helped him fight Kṛṣṇa. Lord Śiva's name is Āśutoṣa, which indicates that he is very easily satisfied when one worships him, regardless of the purpose, and he gives his devotee whatever benediction the devotee wants. Therefore, people are generally very fond of worshiping Lord Śiva. Thus Kāśirāja was helped by Lord Śiva, but in the fight with Lord Kṛṣṇa he was not only defeated but killed. In this way the weapon known as Pāśupata-astra was baffled, and Kṛṣṇa set fire to the city of Kāśī. Later Lord Śiva became conscious of his mistake in helping Kāśirāja, and he begged Lord Kṛṣṇa's forgiveness. As a benediction from Lord Kṛṣṇa, he received a place known as Ekāmra-kānana. Later, the kings of the Keśarī dynasty established their capital there, and for many hundreds of years they reigned over the state of Orissa.
(Sri Caitanya Caritamrta----2:5:140----purport).

The Hari-bhakti-vilāsa cites the following quotation from the Skanda Purāṇa concerning the blaspheming of a Vaiṣṇava:
yo hi bhāgavataṁ lokam upahāsaṁ nṛpottama
karoti tasya naśyanti artha-dharma-yaśaḥ-sutāḥ
nindāṁ kurvanti ye mūḍhā vaiṣṇavānāṁ mahātmanām
patanti pitṛbhiḥ sārdhaṁ mahā-raurava-saṁjñite
hanti nindati vai dveṣṭi vaiṣṇavān nābhinandati
krudhyate yāti no harṣaṁ darśane patanāni ṣaṭ
In a conversation between Mārkaṇḍeya and Bhagīratha, it is said, "My dear King, one who derides an exalted devotee loses the results of his pious activities, his opulence, his reputation and his sons. Vaiṣṇavas are all great souls. Whoever blasphemes them falls down to the hell known as Mahāraurava, accompanied by his forefathers. Whoever kills or blasphemes a Vaiṣṇava and whoever is envious of a Vaiṣṇava or angry with him, or whoever does not offer him obeisances or feel joy upon seeing him, certainly falls into a hellish condition."
(Sri Caitanya Caritamrta----2:5:261----purport).

There is no need to worship demigods. This is confirmed in the Bhagavad-gītā (B.G.7:20):
It is also stated in the Skanda Purāṇa:
vāsudevaṁ parityajya yo ‘nya-devam upāsate
sva-mātaraṁ parityajya śva-pacīṁ vandate hi saḥ
"A person who worships the demigods and gives up Lord Vāsudeva is like a man who gives up the protection of his mother for the shelter of a witch."
(Sri Caitanya Caritamrta----2:24:330----purport).

The remnants of Kṛṣṇa's food are mixed with His saliva. In the Mahābhārata and the Skanda Purāṇa it is stated:
mahā-prasāde govinde nāma-brahmaṇi vaiṣṇave
sv-alpa-puṇyavatāṁ rājan viśvāso naiva jāyate
"Persons who are not very highly elevated in pious activities cannot believe in the remnants of food (prasādam) of the Supreme Personality of Godhead, nor in Govinda, the holy name of the Lord, nor in the Vaiṣṇavas."
(Sri Caitanya Caritamrta----3:16:96----purport).

The cultivation of knowledge, renunciation or meditation may be a little helpful in the beginning, but they cannot be considered necessary for the discharge of devotional service. In other words, devotional service can be discharged independently of the cultivation of knowledge and renunciation. In this regard, there is also a verse from Skanda Purāṇa in which Parvata Muni told a hunter tribesman: "O hunter, the qualifications which you have just now acquired—such as nonviolence and others—are not astonishing, because one who is engaged in devotional service to the Supreme Lord cannot be a source of trouble for anyone under any circumstance."
(Teachings of Lord Caitanya).

There is a verse in the Skanda Purāṇa which states: "My dear Devarṣi (Nārada), you are glorious, and by your mercy, even the lowest creature, a hunter of animals, also became elevated to the path of devotion and attained transcendental attachment for Kṛṣṇa."
(Teachings of Lord Caitanya).

Śrīla Rūpa Gosvāmī specifically mentions herein that every man has the birthright to accept devotional service and to become Kṛṣṇa conscious. He has given many evidences from many scriptures, and he has especially quoted one passage from Padma Purāṇa, wherein the sage Vasiṣṭha tells King Dilīpa, "My dear King, everyone has the right to execute devotional service, just as he has the right to take early bath in the month of Māgha (December-January)." There is more evidence in the Skanda Purāṇa, in the Kāśī-khaṇḍa portion, where it is said, "In the country known as Mayūradhvaja, the lower-caste people who are considered less than śūdras are also initiated in the Vaiṣṇava cult of devotional service. And when they are properly dressed, with tilaka on their bodies and beads in their hands and on their necks, they appear to be coming from Vaikuṇṭha. In fact, they look so very beautiful that immediately they surpass the ordinary brāhmaṇas."
(Nectar of Devotion).