Christians know of some "hard sayings" of Jesus but they may not be fully aware of the danger described in verse 22 of the Gospel of Matthew Chapter 5.
"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."
The late Professor Frank Anderson, recognized as an authority on Aramaic, the language Jesus spoke, told me the Aramaic word "raca" is translated as "nothing" in English, "nada" in Portuguese. In my reading on this verse, the words "Thou fool" were translated from the word "raca" that had an extra ending meaning "not a believer". To live in Israel, a land whose name derives from "Isra" meaning child or lamb, and "el" meaning God, a person who did not believe in God would be regarded as someone who didn't belong.
Thus a modern translation of Matthew 5:22 would be: "But I say to you, whoever is angry with his brother without cause shall be in danger of judgment, and whoever says to his brother "You're nothing!" shall be in danger of the council; but whoever shall say "You're nothing, you don't even count!" will be in danger of ending up in hell.
Thus arrogance and disdain are mortal sins, the deadly effects of which we may never recover from.
Pity those mental health professionals and others who persist in treating the people who come under their control, as unworthy of being treated with respect.