Sin is like smogit is not visible while you are in its midst. The Law takes the sinner above the smog of his own perspective and shows him Heaven's viewpoint. It gives him knowledge of his sin. John Bunyan warned, "The man who does not know the nature of the Law cannot know the nature of sin." Martyn LloydJones said, "The trouble with people who are not seeking for a Savior, and for salvation, is that they do not understand the nature of sin. It is the peculiar function of the Law to bring such an understanding to a man's mind and conscience. That is why great evangelical preachers 300 years ago in the time of the Puritans, and 200 years ago in the time of Whitefield and others, always engaged in what they called a preliminary 'Law work.'" There goes another minute. Gone forever. Go share your faith while you still have time.