Our choices are real.

 Then Jacob tore his garments and put sackcloth on his loins and mourned for his son many days. All his sons and all his daughters rose up to comfort him, but he refused to be comforted and said, "No, I shall go down to Sheol to my son, mourning." Thus his father wept for him. Meanwhile the Midianites had sold him in Egypt to Potiphar, an officer of Pharaoh, the captain of the guard.

Genesis 37:34-36 (ESV)

Evil causes pain to the innocent and the guilty. My sin will affect everyone in my family, workplace, church, and more. Nobody's sin is a private affair between the sinner and God. Essentially, my sins hurt me and anyone else who trusts or loves me, making sin a self-absorbed, narcissistic action.

God is the one who will judge, but because our choices are real, our consequences are real.
When we get a distance from our sin and see its effect in the world and beyond, we begin to hate sin, and that’s exactly where we need to be.