When I was a teen I got quite depressed over how cruel people could be to each other; I had grown up on a remote farm, and I had not seen the interactions between people much. I had to come to terms with it, and I did when I came to an understanding, well perhaps belief, that there is no certainty in this life, so we end up doing what we think that we have to do to survive. Survival is the thing that is most important to us, we whom inhabit this planet with no bounds of thoughts or feelings.
Unfortunately, because we are small in our understanding, and because we are flawed we make some bad choices.
It was the understanding that we hurt each other in our weaknesses, and not because of meanness, that helped me move from the personalness of the idea that people hurt in meanness.
The other thing that helped me to let go of the rope a little farther was the knowledge that I too hurt other people, and I know I was not mean, just flawed.
I hope that you might be able to see that it is beautiful, the struggle we live with, persist with and survive. Of course I feel God is a part of my struggle and survival, but in any case we are all warriors.