We cannot be happy if we expect to live all the time at the highest peak of intensity. Happiness is not a matter of intensity, but of balance and order and rhythm and harmony.
Every man is the builder of a temple, called his body, to the god he worships, after a style purely his own, nor can he get off by hammering marble instead. We are all sculptors and painters, and our material is our own flesh and blood and bones.
Henry David Thoreau