Elements of the universe
I've been aware, since childhood, of the Golden Mean (a proportion). Since reading in school about the Greek Parthenon and its influence in architecture and sculpture, it has popped up frequently. I read about Leonardo Da Vinci's use of it as a guide for human proportions. The length of one limb relative to another is one example. The knuckle to the finger's middle joint and then to the outward joint another. If you apply it to a good work of art the key points of it should fall on the golden mean. Supposedly the old masters were conscious of this relationship in their paintings and designs.