Chapter XVIII Ascesis
When you have adapted the body to a frugal way of living, do not flatter yourself on that, nor if you drink only water, say, on every opportunity, I drink only water. And if you desire at any time to inure yourself to labor and endurance, do it to yourself and not unto the world. And do not embrace the statues; but some time when you are exceedingly thirsty take a mouthful of cold water, and spit it out, and say nothing about it.