If we say that we have fellowship with him and walk in the darkness, we lie, and don't tell the truth.

 It may describe the man who says that he has no responsibility for his sin. It is easy enough to find defences behind which to seek to hide. We may blame our sins on our heredity, on our environment, on our temperament, on our physical condition. We may claim that someone misled us and that we were led astray. It is characteristic of us all that we seek to shuffle out of the responsibility for sin. Or it may describe the man who claims that he can sin and take no harm. 