By passing into the psychedelic phase, the space-faring phase, the entire species is passing into adolescence.

Television is, to my mind, the most insidious drug that the 20th Century has had to deal with.

It's the impossible become possible and yet remaining impossible.

Even a billion people is too much. There's no way back to the simplicity we once knew, but there may be a way forward to the simplicity that we once knew.

What's popularly known as the evolution of consciousness, in other words that the expansion of cognitive repertoire that occurs in human beings, which has always been a great puzzle to evolutionary theory, I believe, occurred in the presence of a kind of catalyst for the human imagination.

One way of assessing the toxicity of a drug is how do you feel the next day?

Plants seem like an excellent model for the kind of future that we should be building.