The Enchiridion

When you've learned to eat simply and cheaply, don't brag about it. And if you drink water instead of wine, don't announce it every chance you get: "I drink water!" First, think about how much more frugal poor people are than you. Think about how much better they handle hardship. If you want to toughen yourself up through exercise and going without things, do it for yourself — not to show off to others. Don't attempt huge feats. When you're really thirsty, just rinse your mouth with water and don't tell anyone.