Although we are all the same in not wanting problems and wanting a peaceful life, we tend to create a lot of problems for ourselves. Encountering those problems, anger develops and overwhelms our mind, which leads to violence. A good way to counter this and to work for a more peaceful world is to develop concern for others. Then our anger, jealousy and other destructive emotions will naturally weaken and diminish.
Sweet is true love though given in vain, in vain;
And sweet is death who puts an end to pain:
I know not which is sweeter, no, not I.
Love, art thou sweet? then bitter death must be:
Love, thou art bitter; sweet is death to me.
O Love, if death be sweeter, let me die.
...
I fain would follow love, if that could be;
I needs must follow death, who calls for me;
Call and I follow, I follow! let me die.
You will be wounded many times in your life. You'll make mistakes. Some people will call them failures but I have learned that failure is really God's way of saying, "Excuse me, you're moving in the wrong direction." It's just an experience, just an experience.
Life is perpetually creative because it contains in itself that surplus which ever overflows the boundaries of the immediate time and space, restlessly pursuing its adventure of expression in the varied forms of self-realization.
There comes a point in your life when you realize:
Who matters,
Who never did,
Who won't anymore,
And who always will.
So, don't worry about people from your past, there's a reason why they didn't make it to your future.