It is amazing how much can be learned from symbols, how much more powerful the imagination becomes with their study, even though one does not, or simply cannot, lock them down into definitive practical knowledge. There will always be an open door, always possibilities to be noticed, which perhaps contrast with what one thought one had learned. So study, no matter how deep, is always inconclusive, since a symbol can never be exhausted. But it pays off, and with it the imagination reaches a new level.