"Now an infinite happiness cannot be purchased by any price less than that which is infinite in value; and infinity of merit can only result from a nature that is infinitely divine or perfect"

"The art of medicine consists in amusing the patient while nature cures the disease"

"Sex is a part of nature. I go along with nature"

"The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom"

"Happiness is not a state to arrive at, but a manner of traveling"

"Where is human nature so weak as in the bookstore?"

"We cannot command Nature except by obeying her"

"Action may not always bring happiness; but there is no happiness without action"

"Happiness is not a reward - it is a consequence. Suffering is not a punishment - it is a result"

"Knowledge of what is possible is the beginning of happiness"

"He loves nature in spite of what it did to him"