It is the causeless mercy of the Supreme Lord that He always tries to bring us back home, back to Godhead. God is liberated, and He tries to make us liberated, but although He is constantly trying, we refuse to accept His instructions. . . . Nonetheless, He has not become angry.- His Divine Grace A.C. Bhaktivedanta Swami Prabhupada Srimad-Bhagavatam 8.3.17, Purport

O son of Partha, those who are not deluded, the great souls, are under the protection of the divine nature. They are fully engaged in devotional service because they know Me as the Supreme Personality of Godhead, original and inexhaustible.- Lord Sri Krishna Bhagavad-gita 9.13

By executing regulated devotional service one is elevated onto the transcendental stage, beyond the material modes of nature. At that time one’s heart becomes illuminated like the sun.- Srila Rupa Goswami, Bhakti-rasamrta-sindhu 1.3.1

We live in the Kali-yuga. This is an age of strife. So it happens that the self-luminous path of pure devotion is completely covered by millions of thorns in the shape of foolish arguments and wordy wranglings. In these circumstances it is absolutely impossible to have knowledge of pure devotion without the mercy of Caitanya Candra. Sri Caitanya Candra is Krishna Himself. He is the Godhead.- Srila Bhaktisiddhanta Sarasvati Thakura Lecture in Vrindavana (22 Karttika, 1928)

Only a rare person who has adopted complete, unalloyed devotional service to Krishna can uproot the weeds of sinful actions with no possibility that they will revive. He can do this simply by discharging devotional service, just as the sun can immediately dissipate fog by its rays.- Sukadeva Goswami, Srimad-Bhagavatam, 6.1.15

A sage who understands the Supreme, the life of all that lives, will not speak of anyone but Him. Such a sage has fallen in love with the Supreme Lord. He is eager to hear of the Lord’s pastimes. He actively serves the Lord. Such a sage is the best of all transcendentalists.- Mundaka Upanisad 3.1.4

The Supreme Lord is not attained by expert explanations, by vast intelligence, nor even by much hearing. He is attained only by one whom He Himself chooses. To such a person He manifests His own form.- Katha Upanisad 1.2.23