“Happiness includes chiefly the idea of satisfaction after full honest effort. No one can possibly be satisfied and no one can be happy who feels that in some paramount affairs he failed to take up the challenge of life.”

“It's not what happens to you, but how you react to it that matters.”

“The happiness which is lacking makes one think even the happiness one has unbearable.”

“Be happy. Talk happiness.”

“Satisfaction of one's curiosity is one of the greatest sources of happiness in life.”

“Happiness is the interval between periods of unhappiness.”

“It is only to the happy that tears are a luxury.”