The jealous are troublesome to others, but a torment to themselves.
From 1 Corinthians 3:1-3: “And so, brothers and sisters, I could not speak to you as spiritual people, but rather as people of the flesh, as infants in Christ. I fed you with milk, not solid food, for you were not ready for solid food. Even now you are still not ready, for you are still of the flesh. For as long as there is jealousy and quarreling among you, are you not of the flesh, and behaving according to human inclinations?”