Life laughs at you when you are unhappy; Life smiles at you when you are happy; But life salutes you when you make other happy.

Even if you're happy with the life you've chosen, you're still curious about the other options.

Give a man health and a course to steer, and he'll never stop to trouble about whether he's happy or not.

Life at its noblest leaves mere happiness far behind; and indeed cannot endure it. Happiness is not the object of life: life has no object: it is an end in itself; and courage consists in the readiness to sacrifice happiness for an intenser quality of life.

Without deep reflection one knows from daily life that one exists for other people.

Many of life's failures are people who did not realize how close they were to success when they gave up.