“What Are You Doing?” by J.C. Ryle
“Do nothing that you would not like God to see. Say nothing you would not like God to hear. Write nothing you would not like God to read. Go no place where you would not like God to find you. Read no book of which you would not like God to say, “Show it to Me.”
Never spend your time in such a way that you would not like to have God say, “What are you doing?”