How many people actually read the Bible and follow it? The truth is right there. How many people know what a marriage or family is all about? Everything starts with an idea, but getting people to act is different. You can't do something well if you don't know what it is or tried it for awhile.
Ideas begin their life as small seeds, so light they may drift through the air like dust motes. If a human is fortunate enough to catch one, when the light is right, it can be planted, just like a seed. With fertile soil, it may grow into a flower or tree, which will re-seed, thus producing a whole field or forest.