“But I warn you – unless your righteousness is better than the righteousness of the teachers of religious law and the Pharisees, you will never enter the Kingdom of Heaven!”
“You have heard that our ancestors were told, “You must not murder. If you commit murder, you are subject to judgment. But I say, if you are even angry with someone, you are subject to judgment.”
We may not even speak or act on this anger, but this anger is the same as the act of murder. We may even speak of and to others negatively, calling them names, even cursing them to hell. This is also to be avoided. The thoughts, the feelings, the words are equal to the act of murder.