 How do one realize these powers fully? Not by becoming adept at every kind of activity in which deliberating and judging on the basis of reason is called for. For then one would have to master every kind of cultural, scientific, and philosophical activity. Rather, Aristotle’s idea is that an individual develops these abilities to the extent that he enjoys and values the exercise of his realized rational powers in a wide variety of different and even seemingly unconnected activities. When that happens, his exercise of these abilities is a continuing source of self-esteem and enjoyment. He comes to like his life and himself and is now a genuine self-lover (Nicomachean Ethics 1168b28–1169a3).