One is not a sinner because he sins. He sins because he is a sinner. 

Author Unknown

The real trouble with the unregenerate is that they do not know and understand the truth about sin…..The moment a man understands the true nature and character of sin he becomes troubled about his soul and seeks for a Saviour.  It is the peculiar function of the law to bring such an understanding to a man’s mind and conscience.*

*D. Martin Lloyd-Jones, Romans 7:1 – 8:4 (Banner of Truth, 1973),     p. 114, as cited by Christopher Ash, Discovering the Joy of a Clear Conscience (P&R Publishing, 2014), p. 92.