“In sum, then, "thinking about thinking" has to be a principal ingredient of any empowering practice of education.”
“Cogito cogito ergo cogito sum -- "I think that I think, therefore I think that I am;" as close an approach to certainty as any philosopher has yet made.”
“Creation is a knack which is empowered by practice, and like almost any skill, it is lost if you don't practice it.”
“Cheerfulness, sir, is the principal ingredient in the composition of health.”
“The Cavaliere has retired to his study and reads, trying not to think about what is going on around him -- one of the principal uses of a book.”
“Everyone else is thinking about themselves as much as you are thinking about yourself and so therefore no one has any time to think about you.”