Full Idea
The incontinent man (weak-willed, 'akrates') acts from desire but not from choice, but the continent man (controlled, 'enkrates') acts from choice but not from desire.
Clarification
'Akrasia' is literally lack of control, and 'enkrateia' is control
Gist of Idea
The akrates acts from desire not choice, and the enkrates acts from choice not desire
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1111b14)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.116
A Reaction
These two categories are contrasted with the truly wicked and the truly good, in both of whom choice and desire work together. The akrates and the enkrates include most people, hovering in the middle ground of moral apprenticeship.