Prabhupada Letters :: 1975.

"Yes, preach as much as possible। Preaching is our life. Travel, here and there, holding kirtana, distributing prasadam and books and speak our philosophy very nicely."

Prabhupada Letters :: 1967.

"Receive one and all as our Master, and serve them with prasadam as diet and Krishna Kirtana as medicine for being free from materially disease। Follow this principle and Krishna will help us on our onward march."