The Language of Plants: A Guide to the Doctrine of Signatures

It is only in the age of technology that human beings have lost a sense of nature being alive. Throughout history, people spoke to nature, and nature communicated with them. During the Middle Ages, reading the "book of nature" was called the doctrine of signatures, which had always been an important part of interacting with nature for traditional healers and herbalists.

"As a child, I just knew which plant to pick up and hold to my head for a headache to go away. Once I heard about the conce...