Hermas (10.2.4-10.2.8)

But ill temper is first foolish, frivolous, and silly; then from silliness comes bitterness, from bitterness wrath, from wrath rage, and from rage fury; then fury, being compounded of such great evils, becomes great and inexpiable sin.

For when these spirits dwell in one vessel, where also the Holy Spirit dwells, there is no room in that vessel, but it is overcrowded.

Therefore the delicate spirit which is unaccustomed to dwell with an evil spirit, or with hardness, departs from such a man, and seeks to dwell with gentleness and quietness.

Then, when it departs from that man where it was dwelling, that man becomes empty of the righteous spirit, and for the future is filled with the evil spirits, and is disorderly in all his actions, being dragged here and there by the evil spirits, and is wholly blinded from goodness of thought. Thus, then, it happens with all who are ill tempered.

Abstain then from ill temper, that most evil spirit, but put on long suffering and withstand ill temper, and be found with the holiness which is beloved of the Lord. See then that you forget not this commandment, for if you master this commandment you will also be able to