I came across a good excerpt from Spurgeon:
Very often men have needed nothing more than the knowledge of sin to enamour them of it, and they have loved sin all the better for knowing it to be sin. The apostle Paul tells us that he had not known lust if the law had not said, “Thou shalt not covet.”
Because of the malignity, as well as the infirmity of our flesh, the mere principle of law will never do anything to purify or ennoble our moral nature. It has been tried by eminent teachers and social reformers.
Dr. Chalmers tells us that in his early ministry, he used to preach morality, and nothing but morality, till, he said, he had hardly a sober or an honest man left in the parish. The preaching of morality seemed to lead to immorality.
read the rest via the link and post your thoughts