Warn Him As A Brother
God is good ... all the time ... and God's goodness resides powerfully within the family of God. In Christ, we are saved individually, but we are placed as saved individuals - together - in God's spiritual family. And as members of His family, we are to have accountability with one another and warn and encourage each other to walk rightly with the Lord. Do you have such reverence for the Lord that you wouldn't want the actions of your life to reflect poorly upon Him? The fear of the Lord is the beginning of wisdom.