Health, rather than wealth, is the main contributor to cheerfulness. Consequently we should try to maintain the highest degree of health possible; for cheerfulness is the very flower of it.
Avoid every kind of excess, all violent and unpleasant emotion, all mental overstrain, take daily exercise in the open air, cold baths and such like hygienic measures. For without a proper amount of daily exercise no one can remain healthy; Aristotle rightly says, Life is movement;
As Epictetus says, Men are not influenced by things, but by their thoughts about things. And, in general, nine-tenths of our happiness depends upon health alone. With health, everything is a source of pleasure;