"There are some who are good, and some who are evil. And the world is full of both."

"Depend upon it, there is nothing so unnatural as the commonplace."

"My mind rebels at stagnation. Give me problems, give me work, give me the most abstruse cryptogram, or the most intricate analysis, and I am in my own proper atmosphere."

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

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