Chanting and dancing in the temple are forms of meditating on Krishna. Thus the boys and girls in this Society for Krishna consciousness are perfect yogis because they are meditating on Krishna twenty-four hours a day. We are teaching the perfect yoga system, not according to our personal whims but according to the authority of Bhagavad-gita. Nothing is concocted or manufactured.
His Divine Grace A. C. Bhaktivedanta Swami Prabhupada
The Path of Perfection, Chapter 4

The Absolute cannot be known by any methods of aspiring endeavor that are familiar to philosophers and scientists who meddle with physical nature. The only method is to wait for the agent of the Absolute to take the initiative, and to pray to be able to recognize him when he actually does appear on this mundane plane.
Srila Bhaktisiddhanta Sarasvati Thakura
Gandhiji’s Ten Questions (Harmonist, January 7, 1933)

It is personally experienced by me that those who are always full of cares and anxieties due to desiring contact of the senses with their objects can cross the ocean of nescience on a most suitable boat—the constant chanting of the transcendental activities of the Personality of Godhead.
Sri Narada Muni
Srimad-Bhagavatam 1.6.34

The Supreme Truth exists outside and inside of all living beings, the moving and the nonmoving. Because He is subtle, He is beyond the power of the material senses to see or to know. Although far, far away, He is also near to all.
Lord Sri Krishna
Bhagavad-gita 13.16

I offer my respectful obeisances to that Supreme Person [Chaitanya Mahaprabhu] who has given the living entities tormented by Kali the holy name of Krishna. That holy name is auspicious to the world, and it destroys all obstacles along with the miseries of lamentation, illusion, and greed.
Srila Sarvabhauma Bhattacharya
Sri Chaitanya-shataka 23

O my Lord! I have no attachment for religiosity, or for accumulating wealth, or for enjoying sense gratification. Let these come as they inevitably must, in accordance with my past deeds. But I do pray for this most cherished boon: birth after birth, let me render unflinching devotional service unto Your two lotus feet.
Maharaja Kulashekhara
Mukunda-mala-stotra 5

The verdict of all revealed scriptures is that by even a moment’s association with a pure devotee, one can attain all success.
Sri Chaitanya Mahaprabhu
Sri Chaitanya-charitamrita, Madhya 22.54