Constant thought of the Lord is the antiseptic method for keeping oneself free from the infectious contamination of the material qualities.
His Divine Grace A.C. Bhaktivedanta Swami Prabhupada
Srimad-Bhagavatam 3.1.32, Purport
O best of kings, if you desire to acquire the extraordinary knowledge by which the supreme goal is realized, then chant the name of Lord Govinda [Krsna] with love and devotion.
Quoted in Srila Bhaktivinoda Thakura's Bhajana Rahasya
One who worships the Supreme Lord and His holy name with undivided faith, knowing Them to be identical, is considered an elevated, first-class devotee, even if he does not understand the intricacies of his own spiritual identity.
Srila Jagadananda Pandita
Prema Vivarta, Chapter 12
Unintelligent men, who do not now Me perfectly, think that I, the Supreme Personality of Godhead, Krsna, was impersonal before and have now assumed this personality. Due to their small knowledge, they do not know My higher nature, which is imperishable and supreme.
Lord Sri Krsna
The Supreme Personality of Godhead, Krsna, is the reservoir of all beauty. All beautiful things emanate from Him, and His personal form is so attractive that it steals the eyes away from all other objects, which then seem devoid of beauty by comparison to Him. When Lord Krsna was on the earth, He attracted the eyes of all people.
Srila Sukadeva Gosvami
That head is the loftiest which is white with dust from bowing down to Lord Krsna. Those eyes are the most beautiful which darkness has abandoned after they have seen Lord Hari. That intelligence is spotless like the white glow of the moon or a conch shell which concentrates on Lord Madhava. And that tongue rains down nectar which constantly glorifies Lord Narayana.
The Bhagavata [Srimad-Bhagavatam] does not allow its followers to ask anything from God except eternal love towards Him. The kingdom of the world, the beauties of the local heavens, and the sovereignty over the material world are never the subjects of Vaisnava prayer.
Srila Bhaktivinoda Thakura
The Bhagavata: Its Philosophy, Its Ethics, and Its Theology