“To dwell on the things that depress or anger us does not help in overcoming them. One must knock them down alone.”
“A happy man is too satisfied with the present to dwell too much on the future.”
“Any fool can know. The point is to understand.”
“I'd rather be an optimist and a fool than a pessimist and right.”
“The only source of knowledge is experience.”
“The only real valuable thing is intuition.”