Proverbs 14:6-8

A scorner seeketh wisdom, and findeth it not: but knowledge is easy unto him that understandeth. Go from the presence of a foolish man, when thou perceivest not in him the lips of knowledge. The wisdom of the prudent is to understand his way: but the folly of fools is deceit.

This verse of fools making a mock at sin, is very expressive: for surely none but fools can do so; to laugh at that which offends God, ruins men, and which nothing but the blood of Christ can expiate; this must be supreme folly indeed.