Richard Evans Schultes quotes:

One wonders how people in primitive societies, with no knowledge of chemistry or physiology, ever hit upon a solution to the activation of an alkaloid by a monoamine oxidase inhibitor. Pure experimentation? Perhaps not.

Adventures happen only to those incapable of planning an expedition.

The Indians' botanical knowledge is disappearing even faster than the plants themselves.

You have a feeling of achievement when you discover a new plant, even a plant that has no use.