Though it is folly to suppose that happiness is a matter of volition, and that we can make ourselves content and cheerful whenever we choose — a theory that many poor hypochondriacs are taunted with till they are nigh driven mad — yet, on the other hand, no sane mind is ever left without the power of self-discipline and self-control in a measure, which measure increases in proportion as it is exercised.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Though it is folly to suppose that happiness is a matter of volition, and that we can make ourselves content and cheerful whenever we choose — a theory that many poor hypochondriacs are taunted with till they are nigh driven mad — yet, on the other hand, no sane mind is ever left without the power of self-discipline and self-control in a measure, which measure increases in proportion as it is exercised." in the context of "Ch. 10" to mean that wisdom is timeless.