God created everything in existence. We refuse to acknowledge it, because by doing so we have to come to terms with his moral law. This moral law is embedded in our conscience and becomes clear through an examination of the conscience. For example things like lying and stealing (which if we are honest most of us have done either or both at one time or another), become heavy burdens when examined in the light of our consciences. In denying God, we can deny our own conscience and then create our own morality.