"Ignorance is the curse of God; knowledge is the wing wherewith we fly to heaven."

"The world is full of wonders, if only we open our eyes."

"I have no doubt that there are other planets inhabited by intelligent beings."

"A man should keep his little brain attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber-room of his library, where he can get it if he wants it."

"Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell."