The supreme occupation (dharma) for all humanity is that by which men can attain to loving devotional service unto the transcendent Lord. Such devotional service must be unmotivated and uninterrupted to completely satisfy the self.
(SRIMAD BHAGAVATAM------1:2:6--------TRANSLATION).

In Bhagavad-gītā the last instruction is to give up all other engagements in the name of religion and take shelter of the Personality of Godhead. Śrīmad-Bhāgavatam also confirms that the highest perfection of religion is that which leads to the devotional service of the Lord, unmotivated and unhampered by material impediments. Religion in its perfect form is the devotional service of the Lord, and irreligion is just the opposite.
(SRIMAD BHAGAVATAM------3:12:25------PURPORT).

On the material platform, religious systems are different. Śrīmad-Bhāgavatam describes them from the very beginning as dharmaḥ kaitavaḥ, cheating religions. None of these religions is actually genuine. The genuine religious system is that which enables one to become a lover of the Supreme Personality of Godhead. In the words of Śrīmad-Bhāgavatam (1.2.6):
sa vai puṁsāṁ paro dharmo yato bhaktir adhokṣaje
ahaituky apratihatā yayātmā suprasīdati
"The supreme occupation (dharma) for all humanity is that by which men can attain to loving devotional service unto the transcendent Lord. Such devotional service must be unmotivatedand uninterrupted in order to completely satisfy the self."

On this platform there is nothing but the service of the Lord. When a person has no ulterior motive, there is certainly oneness and agreement of principles. Since everyone has a different body and mind, different types of religions are needed. But when one is situated on the spiritual platform, there are no bodily and mental differences. Consequently on the absolute platform there is oneness in religion.

(SRI CAITANYA CARITAMRTA-------2:17:184--------PURPORT).

It has already been stated in the Śrīmad-Bhāgavatam, First Canto, Second Chapter, that the highest, most glorious religion is the attainment of causeless, unmotivated devotional service. In pure devotional service, the only motive should be to please the Supreme Personality of Godhead. That is not actually a motive; that is the pure condition of the living entity. In the conditioned stage, when one engages in devotional service, he should follow the instruction of the bona fide spiritual master in full surrender. The spiritual master is the manifested representation of the Supreme Lord because he receives and presents the instructions of the Lord, as they are, by disciplic succession. It is described in Bhagavad-gītā that the teachings therein should be received by disciplic succession, otherwise there is adulteration. To act under the direction of a bona fide spiritual master with a motive to satisfy the Supreme Personality of Godhead is pure devotional service. But if one has a motive for personal sense gratification, his devotional service is manifested differently. Such a man may be violent, proud, envious and angry, and his interests are separate from the Lord's.
(SRIMAD BHAGAVATAM------3:29:8------PURPORT).

As long as one maintains material desires, he cannot be happy. As soon as one engages in the devotional service of the Lord, his mind is purified of all material desires. Then one becomes fully satisfied.
sa vai puṁsāṁ paro dharmo
yato bhaktir adhokṣaje
ahaituky apratihatā
yayātmā suprasīdati
vāsudeve bhagavati
bhakti-yogaḥ prayojitaḥ
janayaty āśu vairāgyaṁ
jñānaṁ ca yad ahaitukam
"The supreme occupation (dharma) for all humanity is that by which men can attain to loving devotional service unto the transcendent Lord. Such devotional service must be unmotivatedand uninterrupted in order to completely satisfy the self. By rendering devotional service unto the Personality of Godhead, Śrī Kṛṣṇa, one immediately acquires causeless knowledge and detachment from the world." (SB 1.2.6-7)

These are the instructions given in Śrīmad-Bhāgavatam, the supreme Vedic literature. One may not be able to go to Pulaha-āśrama, but wherever one is one can happily render devotional service to the Lord by adopting the processes mentioned above.

(SRIMAD BHAGAVATAM------5:7:11------PURPORT).

Pure devotees are described as sama-mati, which means that they never deviate from devotional service under any circumstances. It is not that devotees worship the Supreme Lord only when happy; they worship Him even when in distress. Happiness and distress do not hamper the process of devotional service. Therefore Śrīmad-Bhāgavatam says that devotional service is ahaituky apratihatā, unmotivated and uninterrupted. When a devotee offers devotional service to the Lord without any motive (anyābhilāṣitā-śūnyam (Bhakti-rasāmṛta-sindhu 1.1.11), his service cannot be hampered by any material condition (apratihatā). Thus a devotee who offers service in all conditions of life can conquer the Supreme Personality of Godhead.

(SRIMAD BHAGAVATAM------6:16:34------PURPORT).

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