You know that he was revealed to take away our sins, and in him is no sin.

 When we put these two commandments together, we find the great truth that the Christian life depends on right belief and right conduct combined. We cannot have the one without the other. There can be no such thing as a Christian theology without a Christian ethic; and equally there can be no such thing as a Christian ethic without a Christian theology. Our belief is not real belief unless it issues in action; and our action has neither sanction nor dynamic unless it is based on belief. 