These three words reminds me of three marvelous books on the subject of willpower and Discipline: Willpower instinct; the marshmallow test; and How to fail at almost everything.

Willpower is the hard way to get things done, anyone who cultivates it, achieves the ultimate freedom. As Jocko Willink puts it: Discipline equals freedom
Superb article Benjamin

Productivity is My Passion | Programmer | I Read Obsessively, Experiment Like a Maniac, And Write What Actually Works in Here.