Re-learned

It is a matter of common experience that the really important lessons which we all have to learn in our lives are not learned once for all and then retained, but learned, then forgotten, then re-learned; most of us have had the humiliating experience of learning some spiritual lesson, and then finding that it was substantially an old lesson, which we thought that we had firmly grasped five or ten years before. 

--A. G. Hebert, The Throne of David: A Study of the Fulfillment of the Old Testament in Jesus Christ and His Church (London: Faber and Faber: 1941), 184