Prabhupāda: Yes. Now, suppose you are a well known philosopher. If you say, "There is God," so many people will hear: "Oh, here is a big philosopher." Therefore your studies of philosophy will be perfect when you establish, "Yes, there is God." Otherwise it is useless because you will waste your time and you'll waste... Already they are Godless.
Dr. Kneupper: How does one establish clearly?
Prabhupāda: That requires thinking. That requires knowledge. Therefore we are giving so many books. You can study. You can present the case nicely with argument, philosophy. That is your duty. Avicyutaḥ arthaḥ kavibhir nirūpito yad-uttamaśloka-guṇānu... When you are able to describe God very philosophically, scientifically, mathematically, then your education is perfect.
Dr. Kneupper: Are there any books particularly that focus on all this?
Prabhupāda: Every... There are so many books. There are so many books. The primary book is the Bhagavad-gītā, yes, as it is, if you take it as it is. If you amend it to your whimsical way, then it is gone. Therefore we are presenting. This word we have added, "Bhagavad-gītā As It Is." Don't try to amend it. Then it will be foolishness.