EVIL
To live backwards!!
There is only one source of evil, and that sources is a belief that we are separate from one another. To the degree that you feel separate from others is the degree of which you are capable of doing acts that harm life.
I used to struggle with trying to understand why God would create beings that were evil. I now understand he did not create evil beings or even put evil tendencies in us. Evil is a byproduct of feeling separate from your fellow man and God. When we feel separate we also feel the need to fight to protect ourselves.
The focus of any good religion is to simply reconnect us to God. In truth we have never been separate from God, so what is really being healed by religion is our perceptions of separation.