Full Idea
The discord between the good and the pleasant in one's feelings is lack of self-control.
Clarification
Lack of self-control is weakness of will, or 'akrasia'
Gist of Idea
Akrasia is the clash of two feelings - goodness and pleasure
Source
Aristotle (Eudemian Ethics [c.333 BCE], 1237a08)
Book Reference
Aristotle: 'Eudemian Ethics', ed/tr. Reeve, C.D.C. [Hackett 2021], p.116
A Reaction
A nice clear statement of his view, which opposes the view of Socrates that akrasia is a failure of reason or judgement. Goodness seems to be treated here as a feeling, which is unusual.