Many Christians' experiences are that they are leaky vessels. Whatever they receive from God soon leaks out, and they have to be filled or healed again. That is not the way the Lord intends the Christian life to be. God's gifts and callings are never taken back (Rom. 11:29). It's never God's transmitter that's broken; it's our receivers that's the problem. That's what this teaching is all about.
Romans 1:21 lists four progressive steps that an individual has to take to diminish what God has done in their life. Andrew uses these verses to show what needs to be done to maintain the freshness of any touch or revelation from God.