Patanjali specifically says that there are three paths to the goal of yoga. And they are, control of the breath, control of posture, and light-filled herbs. It says it right there. Stanza 6 of the Yoga Sutras of Patanjali.

Culture as we're practicing it is causing a lot of pain.

The thing that excites me about these informational technologies is I think we are going to be able to use virtual reality to show each other the insides of our own heads.

There is no mundane dimension really, if you have the eyes to see it, it is all transcendental.

What I always hoped for out of the psychedelic voyaging was to bring back something. I always felt, and still feel, that that is the attitude with which you should go into these things.

There has been no progress in 60,000 years in reducing the psychedelic experience to a known quantity. It is as terrifying, as awesome, as ecstatic, as irreducible to us as it was to them.

The monkey body has carried us to this moment of release, but we are coming more and more to exist in a world made by the human imagination.