“The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.”

Paracelsus (1493-1541), Selected Writings (1951)

“I am not dismissing such explanations: one should doubtless keep an open mind about them, though an open mind, to be sure, should be open at both ends, like the food pipe, and have a capacity for excretion as well as intake.”

Northrop Frye, The Great Code (1982)