"Even when there are times that we're not happy, happiness will creep in"

"I feel happy to terrify kids"

"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"

"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 state to arrive at, but a manner of traveling"

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

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

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

"No man is happy who does not think himself so"

"Happiness is nothing more than good health and a bad memory"

"Try to be happy in this present moment, and put not off being so to a time to come, as though that time should be of another make from this which has already come and is ours"