"Sorrow happens, hardship happens, the hell with it, who never knew the price of happiness, will not be happy"

"I feel happy to terrify kids"

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

"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"

"There is only one person who could ever make you happy, and that person is you"

"I was married to Margaret Joan Howe in 1940. Although not a scientist herself she has contributed more to my work than anyone else by providing a peaceful and happy home"

"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"

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

"Happiness depends more on the inward disposition of mind than on outward circumstances"

"Happiness is where we find it, but rarely where we seek it"