“I know there's a proverb which that says 'To err is human,' but a human error is nothing to what a computer can do if it tries.”

“But I know human nature, my friend, and I tell you that, suddenly confronted with the possibility of being tried for murder, the most innocent person will lose his head and do the most absurd things.”

“Can one build an honest house on dishonest foundation? I do not know. But I do know that I want to try. (Edward Ferrier)”

“Elephants can remember, but we are human beings and mercifully human beings can forget.”

“Oh no, I'm not brave. When a thing is certain there's nothing to be brave about. All you can do is to find your consolation.”

“What alchemy there was in human beings.”

“Human curiosity. Such a very interesting thing. Think of what we owe to it throughout history. It is said to be usually associated with the cat. Curiosity killed the cat. But I should say really that the Greeks were the inventors of curiosity.”