Many people thing that art is god knows what, while in fact it is nothing special. A flower painted on a wall is art, even though everybody can do it in two seconds. I really didn't expect it to be arcane knowledge.
That's what I tried to say, I am one of those people.
A flower on the wall, for me, will never EVER be an art... there's no universe for me, in which such things would be considered art.
Art is difficult and art is arcane... in my world.
Leonardo was an artist (among many other things), Picasso was not.