There is a type of hatred toward others that prompts people to enjoy injuring and abusing everyone. The more damage they can inflict, the greater their pleasure. Many of them are from the lowest social strata. However, there are others not of that class who have the same visceral reactions but better superficial manners, having been brought up to live in polite society, and holding legal penalties in due regard.
After death they appear unclothed from the waist up, their hair unkempt. One will rush at another, grab the other’s shoulders in a violent grip, tumble over the person’s head, circle briefly, return, and slug away relentlessly.
Those whom I described as better behaved act similarly but first exchange courtesies, then go around behind the other’s back to attack with their fists. When they see each other face to face, they greet each other and then circle behind again to strike their blows. In this way they preserve appearances.
These spirits are seen on the left at a middling height, some distance away.
Whatever we have done during bodily life, and even whatever we have thought, gradually comes back in the other life. When the hostile, spiteful, underhanded actions we have taken return, the individuals we hated and secretly plotted against also appear before us, and appear in an instant. That is how things operate in the next life. (Later sections [§§6893, 7498], by the Lord’s divine mercy, will deal with this kind of presence.) The negative thoughts we have had about the people are also plain to see, since everyone’s thoughts are perceptible. Miserable states result; hidden hatreds erupt openly.
Bad people find that all their misdeeds and thoughts come back with vivid realism in this way, but good people do not. With them, all states of goodness, friendship, and love return, bringing with them the highest pleasure and happiness.
from Secrets of Heaven, Volume 1, Sections 822, 823