If one sincerely searches for spiritual salvation, then Krsna, being situated in everyone's heart, gives him the intelligence to find a suitable spiritual master. By the grace of a spiritual master . . . , one gets the proper instruction and advances in his spiritual life.

His Divine Grace A. C. Bhaktivedanta Swami Prabhupada
Srimad-Bhagavatam 3.20.4, Purport

And I declare that one who studies this sacred conversation of ours worships Me by his intelligence.

Lord Sri Krsna,
Bhagavad-gita 18. 70

The Supreme Lord, who is greater than the greatest, becomes submissive to even a very insignificant devotee because of his devotional service. It is the beautiful and exalted nature of devotional service that the infinite Lord becomes submissive to the infinitesimal living entity because of it. In reciprocal devotional activities with the Lord, the devotee actually enjoys the transcendental mellow of devotional service.

Lord Sri Caitanya Mahaprabhu
Sri Caitanya-caritamrta, Adi-lila 7.145

As oil stays in sesame seeds, as fire stays in wood, as butter stays in milk, and as fragrance stays in flowers, so I, the Supersoul, stay in the hearts of all living creatures.

Lord Visnu,
Vasudeva Upanisad

Devotional service alone is the eternal supreme occupational duty. It is applicable to and beneficial for everyone. Nondevotional activities, such as karma, jnana, yoga, austerity, and vows are known as inferior religious principles because they are temporary. Sectarianism and narrow-mindedness are the two trademarks of these inferior religious systems. The Supreme Lord is the only object of worship; therefore He delivers everyone by manifesting His various pastimes. This is His unique quality.

Srila Bhaktisiddhanta Sarasvati Thakura
Sri Caitanya-bhagavata, Madhya-khanda 10.78, Commentary

Let the transcendental pastimes of the blackish personality Krsna and the golden cowherd girl Radha, who are constantly overwhelmed with ecstatic love for each other, who always reside in Vrndavana, whose beauty attracts the minds of everyone, and who are the reservoir of wonderful loving pastimes, become constantly manifested in my heart.

Srila Prabodhananda Sarasvati
Sri Vrndavana-mahimamrta 17.4

One who actually satisfies the Supreme Personality of Godhead during one's lifetime becomes liberated from the gross and subtle material conditions. Thus being freed from all material modes of nature, he achieves unlimited spiritual bliss.

Svayambhuva Manu
Srimad-Bhagavatam 4.11.14