“Peace on Earth, good will toward men.”
This is a common expression you hear every year during the Christmas holiday season, if you really wish for peace, let me suggest this:
Make peace first with the face you see in the mirror every day. Until you come to accept yourself, your flaws, both real and imagined, you can never fully accept others and make peace with them. The elements of everything you love about yourself, and hate about them, exist in the both of you, in that way you are kindred. Learn to forgive yourself of your flaws, weaknesses, and others of theirs, then your heart will truly know peace.