Bonaventure — on Rev 5:6 (Collations on the Hexaemeron, Collation 5)

“This virtue gives nobility to the soul. But because at times a man may be indignant at another, there is need for gentleness, which is the remedy against irascibility and anger—not that man should never be angry at all, but that he should be so only in the right circumstances of place and time. Hence, he must have both the face of a man and the face of a lion. At times, however, you believe a man to be kind when he remains silent while knowing of another's sin. Such is not kindness. Listen, therefore: it is said of Jesus that He was troubled, and that He made a kind of whip. Hence, in the First Book of the Machabees, it is written: Woe is me! Wherefore was I born to see the ruin of my people and the ruin of the holy city? Jesus is the Lamb and the Lion.”