Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

Happiness is neither virtue nor pleasure nor this thing nor that but simply growth, We are happy when we are growing.

The smallest seed of faith is better than the largest fruit of happiness.

Happiness does not come from doing easy work but from the afterglow of satisfaction that comes after the achievement of a difficult task that demanded our best.

I would maintain that thanks are the highest form of thought, and that gratitude is happiness doubled by wonder.