Hebrews 11:7

Hebrews 11:7. Moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith.

So you see that faith has a condemning power towards an ungodly world. You do not need to be constantly telling worldlings that they are doing wrong; let them see clearly the evidence of your faith, for that will bear the strongest conceivable witness against their unbelief and sin, even as Noah, by his faith, "condemned the world, and became heir of the righteousness which is by faith."