Me Against Myself

The scientist's third law doesn't come out of books:
My actions seldom command an equal reaction;
Monkeys have evolved into crooks,
Much to Satan’s satisfaction.

They told me that life was a teacher;
But I could never learn to learn:
I have always murdered the preacher,
Who taught me what out of love, I could earn.

Why am I the bullet and not the gun?
Left like an elevator at every alternate story;
O god what unjustice done!
I could never make but was always made to feel sorry!