The Lord is the bestower of all benediction. If someone gives something to the Lord, he is not the loser; he is the gainer by a million times.

His Divine Grace A.C. Bhaktivedanta Swami Prabhupada
Krsna, Chapter 11

Pure devotional service in Krsna consciousness cannot be had even by pious activity in hundreds and thousands of lives. It can be obtained only by paying one price that is intense greed to obtain it. If it is available somewhere, one must purchase it without delay.

Srila Rupa Gosvami

Even if one distributes ten million cows in charity during an eclipse of the sun, lives at the confluence of the Ganges and Yamuna for millions of years, or gives a mountain of gold in sacrifice to thebrahmanas, he does not earn even one hundredth part of the merit derived from chanting Hare Krsna.

Srila Sanatana Gosvami

If one can understand the Supreme Personality of Godhead, the controller of all controllers, one can understand everything else.

Mundaka Upanisad

Every man should act like this: when he meets a person more qualified than himself, he should be very pleased, when he meets someone less qualified than himself, he should be compassionate toward him; and when he meets someone equal to himself, he should make friendship with him. In this way one is never affected by the threefold miseries of the material world.

Sri Narada Muni
Srimad-Bhagavatam 4.8.34

The highest worship is to worship Lord Visnu [Krsna], but even higher than that is to worship His devotees, the Vaisnavas.

Lord Siva
Padma Purana

Devotional service, beginning with the chanting of the holy name of the Lord, is the ultimate religious principle for the living entity in human society.

Sri Yamaraja
Srimad-Bhagavatam 6.3.22

One who does not accept the transcendental form of the Lord is certainly an agnostic. Such a person should be neither seen nor touched. Indeed, he is subject to be punished by Yamaraja [the lord of death].

Lord Sri Caitanya Mahaprabhu
Sri Caitanya-caritamrta, Madhya-lila 6.167