Conscience is like a clear window pane God implants in each one of us at our birth. The pane gradually gets soiled and stained by the sins of our world, losing its clarity over a period of time. Now the person no longer sees clearly what's right and what's wrong. God is the one who can wipe it all clean again if you give him the go-head. While he is at it, ask him to clean out whatever filth and dirt your muddy conscience has allowed into your heart and mind as well, and you'll be clean all over again. This was Jesus' mission when he came into the world, for the Lord specializes in making all things clean.