Big Guns? Big Questions.

"Why should plants contain alkaloids that are close to analogs of our own neurotransmitters, and that enable them to "talk" to us? What "message" are they trying to convey, if any? Was it purely happenstance, purely accident, that led some early, experiment minded shaman to combine the ayahuasca vine and the chacruna leaf to make the tea that raised the curtain on the "invisible landscape" for the first time?" ~Dennis McKenna from Ayahuasca: An Ethnophamacologic History