Fallen Angel

I am a guardian angel to some,
What they all wish to become.
I protect them from their fears,
And make sure to help them through their tears.

To others I am a cursed one.
Something they have all learned to shun.
I am here to instill fear
As I whisper tempting things in their ear.

Many do not know why I exist in this life.
Not knowing if I cause peace or strife.
Unsure if I do the Gods' work, or the Devil's deed,
Knowing that looks can mislead.

I will not tell you which is true.
I must now bid you adieu.
You must decide what you believe,
Am I here to support, or to deceive?