Sin is known by its consequences, and we need merely look honestly at our lives. Sin kills relationships. Sin kills community. Sin kills your best hopes and dreams. Sin kills your soul.
Sin comes in many forms.
We don't need to pretend we don't struggle with our own particular shadow sides. But we do pretend. Like Adam and Eve hiding from God in the Garden of Eden after eating the forbidden fruit, we try to hide from God. Shame makes us hide from one another and even lie to ourselves. It's scary to be honest with ourselves about ourselves, or to confess our sins even to someone we trust.