I should like to make every one I meet discontented with themselves; I should like to awaken in them, about their physical, their intellectual, their moral condition, that divine discontent which is the parent first of upward aspiration and then of self-control, thought, effort to fulfil that aspiration even in part. For to be discontented with the divine discontent, and to be ashamed with the noble shame, is the very germ and first upgrowth of all virtue.

Lecture on Science of Health. 1872.