It is understood that everyone has some nasty habits, but by sticking to Krishna Consciousness, chanting our required rounds loudly, and tending the deities, these items will surely save you.

So always be seriously engaged in serving Krishna and pray to Krishna to help you with your frailties.
- Correspondence, Los Angeles, December 1968

Don’t be after these motorcars, television, and all nonsense things, sporting, wine, women. Simply eat sufficiently, keep your health nicely, chant Hare Krishna, realize Krishna, and go back to home.  This is our philosophy.
Correspondence, Rome, May 25, 1974.

When we chant the Mantra as were presented by the authorities— the process helps communication with the personality of Godhead by the sound waves as we have experienced in the material world of physical waves vibrations. The powerful Mantras have such potency if they are sounded in the right direction. And by chanting the Mantras only one can spiritualise the whole existence as heat can expand on the spherical objects. Mantra Siddhi means complete liberation.

Therefore, there is no difference between the holy name and Mantra. Man means mind and tra deliverance.

That which delivers one from mental speculation is called "Mantra''. "Mantra Siddhi'' is to transcend the gross and subtle mental plane.
- Correspondence, Kanpur, 1957