In exploring this question today, "What is sin?" I want to begin with what you all know. You all know that sin is doing wrong. We all have a conscience, and we know when we have violated it. Often, we may not want to admit that we have done wrong. Nevertheless, Romans 2:14-15 speaks about how even people who do not know God's written law show that they have a sense of right and wrong. They show this by accusing others of wrong while trying to excuse themselves.