“It is not what he has, nor even what he does, which directly expresses the worth of a man, but what he is.”

“all appears to change when we change”

“Uncertainty is the refuge of hope.”

“The stationary condition is the beginning of the end”

“A belief is not true because it is useful”

“To know how to suggest is the art of teaching.”

“The world outside is a strange, but relentless mirror.”

“...an optimistic mind-set finds dozens of possible solutions for every problem that the pessimist regards as incurable.”

“...when dogma enters the brain, all intellectual activity ceases. ”