Philippians 2:14-16

Do everything without complaining or arguing, so that you may be innocent and pure as God's perfect children, who live in a world of corrupt and sinful people. You must shine among them like stars lighting up the sky, as you offer them the message of life. If you do so, I shall have reason to be proud of you on the Day of Christ, because it will show that all my effort and work have not been wasted.