“You must never be limited by external authority, whether it be vested in a church, man, or book. It is your right to question, challenge, and investigate.”

“Don't limit your challenges; challenge your limits.”

“The man of integrity who is true to self and to God will choose the right whether or not anyone is looking because he is self-driven, not externally controlled.”

“God asks no man whether he will accept life. That is not a choice. You must take it. The only question is how.”

“Challenge your limitations for the pure joy of challenge.”

“Reading a book should be a conversation between you and the author. Presumably he knows more about the subject than you do; if not, you probably should not be bothering with his book. But understanding is a two-way operation; the learner has to question himself and question the teacher, once he understands what the teacher is saying. Marking a book is literally an expression of your differences or your agreements with the author. It is the highest respect you can pay him.”