Ambrose of Milan — as excerpted in the Catena Aurea on Matthew 5:5

“(ubi sup.) Soften therefore your temper that you be not angry, at least that you be angry, and sin not. It is a noble thing to govern passion by reason; nor is it a less virtue to check anger, than to be entirely without anger, since one is esteemed the sign of a weak, the other of a strong, mind.”