Nevertheless if you warn the righteous man not to sin, and he does not sin, he shall surely live, because he took warning; and you will have saved your life.
With a little grace, the weirdest things can happen. That jerk you work with might not turn on his heel and storm out when you ask him to stop sinning. He might, instead, stop sinning. He might even turn out to be a friend. And you might find that you were a sign of mercy to him. So don’t get mad, get prophetic. Warn the sinner, not in threats and self-righteousness, but in love and mercy. You might just be saving a life. And it might just be yours.