“The life of this world is not a lake. It is a river. And it is flowing downward to destruction. If you do not listen earnestly to Jesus and consider him daily and fix your eyes on him hourly, then you will not stand still, you will go backward. You will float by” (John Piper, “The Danger of Drifting from the Word,” preached on April 28, 1996. You can read it here).
“For this reason we must pay much closer attention to what we have heard, so that we do not drift away from it” (Hebrews 2:1).