And thus the literary man has two fires in his body: the strain of his mental work and the overmuch of blood in his head…. Man, so rich in knowledge, has also become rich in diseases, but poor in health and physical strength. – Sebastian Kneipp, Thus Shalt Thou Live: Hints and Advice for the Healthy and the

What man is happy? He who has a healthy body, a resourceful mind, and a docile nature. – Thales of Miletus, translated from Greek

What is called genius is the abundance of life and health. – Henry David Thoreau