He that is angry without cause, shall be in danger; but he that is angry with cause, shall not be in danger. St. John Chrysostom
Anger is one of the Seven Deadly Sins but not all anger is a sin. Anger is an emotion and emotions by themselves are not sinful or virtuous. An emotion will cease or flourish only at the discretion of the will. Peter Kreeft in his book Growing in Virtue offers this distinction between the two…
The commonest way in which the will comes in to make an emotion sinful or virtuous is by consent, which is basically the will’s approval or go-ahead to an emotion…What makes the emotion of anger into the sin of anger are two things. First, as we have seen, there must be the involvement of the will. Second, the anger must be inordinate, this is, wrong, irrational, too strong for the occasion or the person we are angry at.