Here is a key which may unlock the study of the esoteric. It will allow your studies to bridge many disciplines in the esoteric & healing arts. It certainly did for me!
Correspondence means the application of meanings across several systems. it's similar to the analogies you may have studies in school, something like "seeds are to the apple what puppies are to the dog". Or more poetically, "childhood shows the man like morning shows the day" (John Milton).
Correspondences are similes and metaphors, analogies, that occultist and mystics have used to draw meaning across many systems, including: herbology, astrology, tarot, numerology, and more recently the incorporation of chakra systems, crystals and stones.
Herbs and plants