Chapter 28 — Part III: The Decalogue — The Fifth Commandment
Section 18. This, however, is to be understood of cases in which no just cause of anger exists. God and His laws permit us to be angry when we chastise the faults of those who are subject to us. For the anger of a Christian should spring from the Holy Spirit and not from carnal impulse, seeing that we should be temples of the Holy Ghost, in which Jesus Christ may dwell.