“If a man insisted always on being serious, and never allowed himself a bit of fun and relaxation, he would go mad or become unstable without knowing it.”

“Oh the places you'll go! There is fun to be done!”

“Life is a lot more fun if you treat its challenges in creative ways.”

“It's fun to be hopelessly in love. It's dangerous, but it's fun.”

“But this I know: if all mankind were to take their troubles to market with the idea of exchanging them, anyone seeing what his neighbor's troubles were like would be glad to go home with his own.”

“The most hateful grief of all human griefs is to have knowledge of a truth, but no power over the event.”

“The secret of success is that it is not the absence of failure, but the absence of envy.”