Question for parents: do you want to make your children safe, or strong? - Jordan Peterson

You plunge into that underworld space, and that's also where you begin to nurse feelings of resentment and aggrievement and murder and homicide—and even worse. If people are betrayed enough, they become obsessed with the futility of Being itself, and they go to places where perhaps no one would ever want to go if they were in their right mind. And they begin to nurse fantasies of the ultimate revenge, and that's a horrible place to be. That's hell. That's why hell has always been a suburb of the underworld, because if you get plunged into a situation that you don't understand, and things are not good for you anymore, it's only one step from being completely confused, to being completely outraged and resentful, and then it's only one step from there to really looking for revenge.
And that can take you places—well, that merely to imagine properly can be traumatic. And I've seen that with people many times. And I think that anybody who uses their imagination on themselves can see how that happens, because I can't imagine that there is a single person in the room who hasn't nursed fairly intense fantasies of revenge, at least at one point in their life—and usually for what appear to be good reasons. It can shake your faith in Being to be betrayed, but if it shakes it so badly that you turn against Being itself, that's certainly no solution. All it does is make everything that's bad even worse.

The light that you discover in your life is proportionate to the amount of the darkness you are willing to forthrightly confront (from the debate between Jordan Peterson and Slavoj Zizek)

I learned two very important lessons from Carl Jung, the famous Swiss depth psychologist, about “doing unto others as you would have them do unto you” or “loving your neighbour as yourself.” The first lesson was that neither of these statements has anything to do with being nice. The second was that both are equations, rather than injunctions. If I am someone’s friend, family member, or lover, then I am morally obliged to bargain as hard on my own behalf as they are on theirs. If I fail to do so, I will end up a slave, and the other person a tyrant. What good is that? It is much better for any relationship when both partners are strong. Furthermore, there is little difference between standing up and speaking for yourself, when you are being bullied or otherwise tormented and enslaved, and standing up and speaking for someone else. As Jung points out, this means embracing and loving the sinner who is yourself, as much as forgiving and aiding someone else who is stumbling and imperfect.