(to re-post a post of mine)
Anger can be mortal …and it can be venial. And can sometimes be difficult too due to the passions involved.
(and there is even “Just Anger” like that of Jesus in the Temple!)
Examples of mortal sin:
If one deliberately desires to murder someone or seriously wound someone – such is gravely against charity.
One could note is when it leads to serious injustice or serious scandal…seriously offends charity …or hatred of God etc. Such are also grave.
Also In terms of immoderate outbursts…such can often be venial sin.
Though if a person were to deliberately go into such a rage that it they can be considered to have lost their reason…then it is a different story.
I imagine more could be said …
Your confessor can assist you in judging such if needed.
In
general regarding mortal sin:
Compendium issued by Pope Benedict XVI
- When does one commit a mortal sin?
1855-1861
1874
One commits a mortal sin when there are simultaneously present: grave matter, full knowledge, and deliberate consent. This sin destroys charity in us, deprives us of sanctifying grace, and, if unrepented, leads us to the eternal death of hell. It can be forgiven in the ordinary way by means of the sacraments of Baptism and of Penance or Reconciliation.
- When does one commit a venial sin?
1862-1864
1875
One commits a venial sin, which is essentially different from a mortal sin, when the matter involved is less serious or, even if it is grave, when full knowledge or complete consent are absent. Venial sin does not break the covenant with God but it weakens charity and manifests a disordered affection for created goods. It impedes the progress of a soul in the exercise of the virtues and in the practice of moral good. It merits temporal punishment which purifies.
vatican.va/archive/compendium_ccc/documents/archive_2005_compendium-ccc_en.html