Etheric Body, Plant Life, and Human Healing Processes

How then can we speak concretely about this relationship of the etheric with the physical? From the abstract point of view, we can say that the etheric is nearer to the astral than to the physical; for the etheric is open to the forces from above. But we must expect also some relationship between the etheric and the physical. So we must take this two-sided kinship and must look for something which guides us to it. I shall try to do this in the most concrete manner possible.