In college, we were assigned a book to read called Willpower by Roy Baumeister and John Tierney. Their thesis states that our ability to make constructive choices and accomplish things is governed by our willpower, and our willpower for a given day is finite. When our willpower is depleted we are less likely to be disciplined about the choices we make and less likely to be effective in whatever we’re trying to do. Willpower is a measurable and depletable resource.
