We can safely conclude that service is the constant companion of the living being and that the rendering of service is the eternal religion of the living being. Yet man professes to belong to a particular type of faith with reference to particular time and circumstance and thus claims to be a Hindu, Muslim, Christian, Buddhist or an adherent of any other sect. Such designations are non-sanātana-dharma. A Hindu may change his faith to become a Muslim, or a Muslim may change his faith to become a Hindu, or a Christian may change his faith and so on. But in all circumstances the change of religious faith does not affect the eternal occupation of rendering service to others. The Hindu, Muslim or Christian in all circumstances is servant of someone. Thus, to profess a particular type of faith is not to profess one's sanātana-dharma. The rendering of service is sanātana-dharma.
(BHAGAVAD-GITA------INTRODUCTION).

Ātmā, or self, is distinguished from matter and material elements. It is spiritual in constitution, and thus it is never satisfied by any amount of material planning. All scriptures and spiritual instructions are meant for the satisfaction of this self, or ātmā. There are many varieties of approaches which are recommended for different types of living beings indifferent times and at different places. Consequently, the numbers of revealed scriptures are innumerable. There are different methods and prescribed duties recommended in these various scriptures. Taking into consideration the fallen condition of the people in general in this age of Kali, the sages of Naimiṣāraṇya suggested that Śrī Sūta Gosvāmī relate the essence of all such scriptures because in this age it is not possible for the fallen souls to understand and undergo all the lessons of all these various scriptures in a varṇa and āśrama system.
(SRIMAD BHAGAVATAM-------1:1:11-------PURPORT).

The servants of God are to be respected as God by the devotees who actually want to go back to Godhead. Such servants of God are called mahātmās, or tīrthas, and they preach according to particular time and place. The servants of God urge people to become devotees of the Lord. They never tolerate being called God. Śrī Caitanya Mahāprabhu was God Himself according to the indication of the revealed scriptures, but He played the part of a devotee. People who knew Him to be God addressed Him as God, but He used to block His ears with His hands and chant the name of Lord Viṣṇu. He strongly protested against being called God, although undoubtedly He was God Himself. The Lord behaves so to warn us against unscrupulous men who take pleasure in being addressed as God.
(SRIMAD BHAGAVATAM-------1:2:16-------PURPORT).

All demigods who are empowered by the Supreme Lord are also separated parts and parcels. They do not belong to the categories of viṣṇu-tattva. The viṣṇu-tattvas are living beings equally as powerful as the original form of the Personality of Godhead, and They display different categories of power in consideration of different times and circumstances. The separated parts and parcels are powerful by limitation. They do not have unlimited power like the viṣṇu-tattvas. Therefore, one should never classify the viṣṇu-tattvas, or the plenary portions of Nārāyaṇa, the Personality of Godhead, in the same categories with the parts and parcels. If anyone does so he becomes at once an offender by the name pāṣaṇḍī. In the age of Kali many foolish persons commit such unlawful offenses and equalize the two categories.
(SRIMAD BHAGAVATAM-------1:2:26-------PURPORT).

Men with a poor fund of knowledge only accept the history of the world from the time of Buddha, or since 600 B.C., and prior to this period all histories mentioned in the scriptures are calculated by them to be only imaginary stories. That is not a fact. All the stories mentioned in the Purāṇas and Mahābhārata, etc., are actual histories, not only of this planet but also of millions of other planets within the universe. Sometimes the history of planets beyond this world appear to such men to be unbelievable. But they do not know that different planets are not equal in all respects and that therefore some of the historical facts derived from other planets do not correspond with the experience of this planet. Considering the different situation of different planets and also time and circumstances, there is nothing wonderful in the stories of the Purāṇas, nor are they imaginary. We should always remember the maxim that one man's food is another man's poison. We should not, therefore, reject the stories and histories of the Purāṇas as imaginary. The great ṛṣis like Vyāsa had no business putting some imaginary stories in their literatures.
(SRIMAD BHAGAVATAM-------1:3:41-------PURPORT).

Śrīmad-Bhāgavatam is the topmost theological science, and therefore it can react on the laymen as medicinal doses. Because it contains the transcendental activities of the Lord, there is no difference between the Lord and the literature. The literature is the factual literary incarnation of the Lord. So the laymen can hear the narration of the activities of the Lord. Thereby they are able to associate with the Lord and thus gradually become purified from material diseases. The expert devotees also can discover novel ways and means to convert the nondevotees in terms of particular time and circumstance. Devotional service is dynamic activity, and the expert devotees can find out competent means to inject it into the dull brains of the materialistic population. Such transcendental activities of the devotees for the service of the Lord can bring a new order of life to the foolish society of materialistic men. Lord Śrī Caitanya Mahāprabhu and His subsequent followers exhibited expert dexterity in this connection. By following the same method, one can bring the materialistic men of this age of quarrel into order for peaceful life and transcendental realization.
(SRIMAD BHAGAVATAM-------1:5:16-------PURPORT).

Expert religionists know perfectly well how to adjust religious principles in terms of time and place. All the great ācāryas or religious preachers or reformers of the world executed their mission by adjustment of religious principles in terms of time and place. There are different climates and situations in different parts of the world, and if one has to discharge his duties to preach the message of the Lord, he must be expert in adjusting things in terms of the time and place. Bhīṣmadeva was one of the twelve great authorities in preaching this cult of devotional service, and therefore he could receive and welcome all the powerful sages assembled there at his deathbed from all parts of the universe. He was certainly unable at that time to welcome and receive them physically because he was neither at his home nor in a normal healthy condition. But he was quite fit by the activities of his sound mind, and therefore he could utter sweet words with hearty expressions, and all of them were well received. One can perform one's duty by physical work, by mind and by words. And he knew well how to utilize them in the proper place, and therefore there was no difficulty for him to receive them, although physically unfit.
(SRIMAD BHAGAVATAM-------1:9:9-------PURPORT).

The Lord says in Bhagavad-gītā (yajñārthāt karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ [Bg. 3.9]) that one must perform sacrifices recommended in the scriptures in order to get rid of commitments of all unauthorized work, or even unintentional crimes which we are apt to commit. By doing so, one shall be freed from all kinds of sins. And those who do not do so but work for self-interest or sense gratification have to undergo all tribulations accrued from committed sins. Therefore, the main purpose of performing sacrifices is to satisfy the Supreme Personality Hari. The process of performing sacrifices may be different in terms of different times, places and persons, but the aim of such sacrifices is one and the same at all times and in all circumstances, viz. , satisfaction of the Supreme Lord Hari. That is the way of pious life, and that is the way of peace and prosperity in the world at large. Mahārāja Yudhiṣṭhira did all these as the ideal pious king in the world.
(SRIMAD BHAGAVATAM-------1:12:34-------PURPORT).

The method of worship—chanting the mantra and preparing the forms of the Lord—is not stereotyped, nor is it exactly the same everywhere. It is specifically mentioned in this verse that one should take consideration of the time, place and available conveniences. Our Kṛṣṇa consciousness movement is going on throughout the entire world, and we also install Deities in different centers. Sometimes our Indian friends, puffed up with concocted notions, criticize, "This has not been done. That has not been done." But they forget this instruction of Nārada Muni to one of the greatest Vaiṣṇavas, Dhruva Mahārāja. One has to consider the particular time, country and conveniences. What is convenient in India may not be convenient in the Western countries. Those who are not actually in the line of ācāryas, or who personally have no knowledge of how to act in the role of ācārya, unnecessarily criticize the activities of the ISKCON movement in countries outside of India. The fact is that such critics cannot do anything personally to spread Kṛṣṇa consciousness. If someone does go and preach, taking all risks and allowing all considerations for time and place, it might be that there are changes in the manner of worship, but that is not at all faulty according to śāstra. Śrīmad Vīrarāghava Ācārya, an ācārya in the disciplic succession of the Rāmānuja-sampradāya, has remarked in his commentary that caṇḍālas, or conditioned souls who are born in lower than śūdra families, can also be initiated according to circumstances. The formalities may be slightly changed here and there to make them Vaiṣṇavas.
(SRIMAD BHAGAVATAM-------4:8:54-------PURPORT).

According to one's destiny, one enjoys allotted happiness and distress, even though one keeps himself in one place. This is the injunction of the śāstras. When one is spiritually situated, he may stay in one place, and all his necessities will be supplied by the arrangement of the supreme controller. Unless one is a preacher, there is no need to travel all over the world. A person can stay in one place and execute devotional service suitably according to time and circumstance. When Ṛṣabhadeva saw that He was simply being disturbed by traveling throughout the world, He decided to lie down in one place like a python. Thus He ate, drank, and He passed stool and urine and smeared His body with them so that people would not disturb Him.
(SRIMAD BHAGAVATAM-------5:5:32-------PURPORT).

Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura gives the following explanation in his Tathya. The word śravaṇa refers to giving aural reception to the holy name and descriptions of the Lord's form, qualities, entourage and pastimes as explained in Śrīmad-Bhāgavatam, Bhagavad-gītā and similar authorized scriptures. After aurally receiving such messages, one should memorize these vibrations and repeat them (kīrtanam). Smaraṇam means trying to understand more and more about the Supreme Lord, and pāda-sevanam means engaging oneself in serving the lotus feet of the Lord according to the time and circumstances. Arcanam means worshiping Lord Viṣṇu as one does in the temple, and vandanam means offering respectful obeisances. Man-manā bhava mad-bhakto mad-yājī māṁ namaskuru [Bg. 18.65]. Vandanam means namaskuru—offering obeisances or offering prayers. Thinking oneself to be nitya-kṛṣṇa-dāsa, everlastingly a servant of Kṛṣṇa, is called dāsyam, and sakhyam means being a well-wisher of Kṛṣṇa. Kṛṣṇa wants everyone to surrender unto Him because everyone is constitutionally His servant. Therefore, as a sincere friend of Kṛṣṇa, one should preach this philosophy, requesting everyone to surrender unto Kṛṣṇa. Ātma-nivedanam means offering Kṛṣṇa everything, including one's body, mind, intelligence and whatever one may possess.
(SRIMAD BHAGAVATAM-------7:5:23-24-------PURPORT).