Self-discipline is the ultimate form of self-care.
This is the basic root of all happiness. Whether you’re listening to Aristotle or the psychologists at Harvard or Jesus Christ or the goddamn Beatles, they all say that happiness comes from the same thing: caring about something greater than yourself, believing that you are a contributing component in some much larger entity, that your life is but a mere side process of some great unintelligible production.
If people cheat, it's because something other than the relationship is more important to them. It may be power over others. It may be validation through sex. It may be giving in to their own impulses.
