In Bhagavad-gītā it is stated by the Lord Himself that the acts and character of great authorities are followed by people in general. Leaders of ideal character are therefore needed in society. Kṛṣṇa, the Supreme Personality of Godhead, appeared in this material world just to show the example of perfect authority, and people have to follow His path. The Vedic injunction is that one cannot understand the Absolute Truth simply by mental speculation or logical argument. One has to follow the authorities. Mahājano yena gataḥ sa panthāḥ [Cc. Madhya 17.186]. Great authorities should be followed; otherwise, if we simply depend on the scriptures, we are sometimes misled by rascals, or else we cannot understand or follow the different spiritual injunctions.
(Srimad Bhagavatam------3:16:23--------purport).

In the same Hayaśīrṣa-pañcarātra, after Nṛsiṁhadeva wanted to give benedictions to Prahlāda Mahārāja, Prahlāda did not accept any material benediction and simply asked the favor of the Lord to remain His eternal devotee. In this connection, Prahlāda Mahārāja cited the example of Hanumān, the eternal servitor of Lord Rāmacandra, who also set an example by never asking any material favor from the Lord. He always remained engaged in the Lord's service. That is the ideal character of Hanumān, for which he is still worshiped by all devotees. Prahlāda Mahārāja also offered his respectful obeisances unto Hanumān. There is a well-known verse spoken by Hanumān in which he says, "My dear Lord, if You like You can give me salvation from this material existence, or the privilege of merging into Your existence, but I do not wish any of these things. I do not want anything which diminishes my relationship with You as servant to master, even after liberation."
(Nectar of Devotion).

The gṛhastha-āśrama is a sort of concession combining sense gratification with a regulative life. It is to enable one to easily retire in the middle of life and engage fully in austerities in order to transcend material sense gratification once and for all. Therefore in the vānaprastha stage of life, tapasya, or austerity, is strongly recommended. Mahārāja Pṛthu followed exactly all the rules of vānaprastha life, which is technically known as vaikhānasa-āśrama. The word vaikhānasa-susammate is significant because in vānaprastha life the regulative principles are also to be strictly followed. In other words, Mahārāja Pṛthu was an ideal character in every sphere of life. Mahājano yena gataḥ sa panthāḥ: [Cc. Madhya 17.186] one should follow in the footsteps of great personalities. Thus by following the exemplary character of Mahārāja Pṛthu, one can become perfect in all respects while living this life or while retiring from active life. Thus after giving up this body, one can become liberated and go back to Godhead.
(Srimad Bhagavatam------4:23:4--------purport)

Mahārāja Parīkṣit questioned Śukadeva Gosvāmī, and Śukadeva Gosvāmī referred the matter to Nārada, who had in the same way questioned Nārāyaṇa Ṛṣi, who had put the matter to still higher authorities on the planet of Janaloka, where it was discussed among the great Kumāras—Sanātana, Sanaka, Sanandana and Sanat-kumāra. These four brahmacārīs, the Kumāras, are recognized scholars in the Vedas and other śāstras. Their unlimited volumes of knowledge, backed by austerities and penances, are exhibited by their sublime, ideal character. They are very amiable and gentle in behavior, and for them there is no distinction between friends, well-wishers and enemies. Being transcendentally situated, such personalities as the Kumāras are above all material considerations and are always neutral in respect to material dualities.
(Krsna Book).

(2) By chastising Junior Haridāsa, the Lord set the standard for ācāryas, or the heads of institutions propagating the Caitanya cult, and for all actual devotees. Śrī Caitanya Mahāprabhu wanted to maintain the highest standard. (3) Śrī Caitanya Mahāprabhu instructed that a pure devotee should be simple and free from sinful activities, for thus one can be His bona fide servant. Śrī Caitanya Mahāprabhu taught His followers how to observe the renounced order strictly. (4) Śrī Caitanya Mahāprabhu wanted to prove that His devotees are exalted and that their character is ideal. He kindly accepts His faithful devotees and teaches them how much tribulation and disturbance can be produced by even a slight deviation from the strict principles of devotional life.
(Sri Caitanya Caritamrta-------3:2:172-------purport).