So our proposition is that if you do not know God and here is God, Krsna, why don't you accept Him? You do not know first of all. And if I present, "Here is God," then why don't you accept? What is the answer? We are presenting God, "Here is God." And big, big acaryas have accepted. Ramanujacarya, Madhvacarya, Visnusvami, Lord Caitanya, in our disciplic succession my Guru Maharaja, and I am preaching, "This is God." I am not presenting a God whimsically. I am presenting a God who is recognized. So why don't you accept? What is the difficulty? 

[Srila Prabhupada Garden Conversation, with Professors, Chairman of the Religion Dept. of U.S.C., and Dr. Stillson Judah, and others, June 24, 1975, Los Angeles]