“Let everyone who names the name of Christ depart from iniquity” (cf. 2 Tim 2:15–19).
Shun, Run Away From, Avoid:
Col 4:6; Eph 4:29. If you speak profanity it's from your heart, therefore it reveals that you are a profane person.
If a person does not work, they do not eat (2 Thess 3:6–15).
3. Because More Ungodliness Follows
Psalm 1. More ungodliness follows. Sin is not just a mistake or error in judgement. It is a serious cause for separation from God. Sin is costly.
4. Because Influences Spread
It influences us to sin more and it influences others too.