In many cultures of the world you do not really know something until you are putting it into practice and teaching it to others, prior to that you are learning something theoretically rather than actually knowing it. In our Western church culture simply agreeing with something intellectually is enough, but the result is a theoretical faith rather than an actual one. Theoretical Christians will never change a culture. As a remedy we have adopted this understanding: Do not teach a second lesson until the first one is done, and a lesson is not truly learned until it is passed on to others.