"There is no more unfortunate creature under the sun than a man who has everything."

"The greatest blessings of mankind are within us and within our reach. A wise man is content with his lot, whatever it may be, without wishing for what he has not."

"All cruelty springs from weakness."

"True happiness is to enjoy the present, without anxious dependence upon the future, not to amuse ourselves with either hopes or fears but to rest satisfied with what we have, which is sufficient, for …"

"Hang on to your youthful enthusiasms — you’ll be able to use them better when you’re older."