“It is difficult to find happiness within oneself, but it is impossible to find it anywhere else.”

“Satisfaction consists in freedom from pain, which is the positive element of life.”

“In action a great heart is the chief qualification. In work, a great head.”

“Consequently, we should try as much as possible to maintain a high degree of health; for cheerfulness is the very flower of it.”

“I have long held the opinion that the amount of noise that anyone can bear undisturbed stands in inverse proportion to his mental capacity and therefore be regarded as a pretty fair measure of it.”

“A pessimist is an optimist in full possession of the facts.”

“All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.”