John Chrysostom
Catena Aurea · Matthäusevangelium 5
For I say unto you, That except your righteousness shall exceed the righteousness of the Scribes and Pharisees, ye shall in no case enter into the kingdom of heaven. Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment: But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
This is the first mention of hell, though the kingdom of Heaven had been mentioned some time before, which shews that the gifts of the one comes of His love, the condemnation of the other of our sloth. Many thinking this a punishment too severe for a mere word, say that this was said figuratively. But I fear that if we thus cheat ourselves with words here, we shall suffer punishment in deed there. Think not then this too heavy a punishment, when so many sufferings and sins have their beginning in a word; a little word has often begotten a murder, and overturned whole cities. And yet it is not to be thought a little word that denies a brother reason and understanding by which we are men, and differ from the brutes.