Srila Prabhupada’s Humility
[…] The same day Prabhupada dictated a letter to Karandhara:
"I could never have thought it was possible to distribute so many of our literatures. Therefore I can understand it is simply Krishna's blessing us for your sincerely working on His behalf. Actually, that is the secret of my success, not that personally I have done anything wonderful, but that because those who are helping me are sincere. They have done the work. That is the reason for our success all over the world where others have failed. A little sincerity is very difficult thing in this age of hypocrisy and bluff, but I am so fortunate that Krishna has sent me all of you nice boys and girls who are sincerely working. Please convey to all of them my deepest appreciation."
Srila Prabhupada's letters acknowledging the Christmas marathon and assuring the devotees that they would go back to Godhead sent the book distribution movement flying into the new year with great momentum. […]
From Prabhupada Lilamrita, chapter 45, "please distribute books."