Willpower Isn’t One Thing, It’s Three:
1. One part of willpower concerns the ability to do what is disagreeable,
2. Another part concerns willingness to not do something, and
3. A final part concerns knowing what you truly want in the first place.
These are, in short, your will-to, will-not-to, and want-to powers.
The first has to do with desires and aversions …. The second, with cases of choice and refusal, and, in general, with duty … the third with the avoidance of error and rashness in judgment (III.2, 2–3).