Willpower
Your strength of Will. The measurable amount of determination and self-drive you have.
0: You have no Will at all, a mere husk of a thing.
1: Your willpower is feeble.
2: Your will is about as strong as the next person's.
3: Your will is being tempered.
4: Your will is strong, you can overcome.
5: Your will is powerful, it can be called upon with ease.
6: Your will can be imposed on others some say.