Nudges play to our weakness—our tendency to take the easy road most taken. They change the environment outside us in order to make good choices easier. But nudges will never, on their own, build the wisdom and courage we need—partly because we often can’t control our environment, no matter how much we’d like to. We need to change something inside of us as well: to develop the strength to make good choices even when everything around us is nudging, or pushing, us in the wrong direction. And for that we need disciplines.
