"Let the fear of a danger be a spur to prevent it: He that fears otherwise, gives advantage to the danger."

"What is perceived is dictated by the instrument. If you had other eyes, or another mind, you would see all …"

"What, then, will this philosophy be?  Thomas only employed it for the service it renders Christian wisdom. …"

"When you come to see you are not as wise today as you thought you were yesterday, you are wiser today."

"The proper route to an understanding of the world is an examination of our errors about it."

"Innocence always calls mutely for protection when we would be so much wiser to guard ourselves against it: …"

"The first thing Bohr said to me was that it would only then be profitable to work with him if I understood …"