Is Self Control a Virtue?

Self-control and its absence aren't a virtue and vice but are some other sort of thing (lack of self control isn't a choice but acting regardless of choice). So self-control is not the same as temperance, nor is it quite the same as saintliness (a nearly-divine, superhuman self-control).

Why is self-control a virtue?

Self-control is the mother of all virtues. It is the foundation of all we have to do to please God, to obey His commandments and to do His will. It is the virtue we need to be an asset in the society. It is the virtue we need to be in union with God and to maintain genuine friendship with fellow human beings.

Is self discipline a virtue?

Despite the title, this is not an defence of ill-discipline, or licentiousness. It is merely an attempt to explain why self-discipline — which many think of as a 'virtue' — is not a virtue at all, but merely a step in the acquisition of virtue. It is but a means to an end.