How to explain spiritual development to MEN?

How to explain spiritual development to MEN? Let me give it a try. First you realise that your body is like a black box and that although you operate it, you don’t know how to drive. Then you get to know this body and you realise it is many times more complicated than a car. You also learn its (speed) limits and how to maintain it properly. Then you ask: this is great, but what is it for? You realise that it is in fact designed for space travel and its destination is home. So in this sense, the Transformers were right after all!