Anger cannot be overcome by anger. If someone is angry with you, and you show anger in return, the result is a disaster. On the other hand, if you control your anger and show its opposite - love, compassion, tolerance and patience - not only will you remain peaceful, but the other person's anger will also diminish.
Because the existing education system is oriented towards materialistic goals we need to pay special attention to inner values such as tolerance, forgiveness, love and compassion.
I think there is a complicated side effect to overcoming evil in that we are forever changed by it. I think after we ingest some of the cruelty of the world, it takes years off of our lives, but it also gives us wisdom and a little grace, hopefully a sense of compassion.
For fear of causing terror to living beings, Mahamati, let the Bodhisattva who is disciplining himself to attain compassion, refrain from eating flesh.
According
to my own experience, the highest level of inner calm comes from the
development of love and compassion. The more concerned we are with the
happiness of others, the more we increase our own well-being.
Friendliness and warmth towards others allow us to relax and help us to
dispel any sense of fear or insecurity so we can overcome whatever
obstacles we face.
If once we admit, be it for a single hour or in a single instance, that there can be anything more important than compassion for a fellow human being, then there is no crime against man that we cannot commit with an easy conscience.
I have not lost Allah's hope in us to show compassion where none exists and to extend mercy in the most difficult of circumstances. We as Muslims must lead by example.