Although the events we appear to perceive in dreams are illusory, our feelings in response to dream content are real. Indeed, most of the events we experience in dreams are real; when we experience feelings, say, anxiety or ecstasy, in dreams, we really do feel anxious or ecstatic at the time.

In the dream state, the only essential difference from waking is the relative absence of sensory input, which makes dreaming a special case of perception without sensory input.

The consciousness of lucid dreaming is a cultural evolution. It's something that we are talking about and learning about, not biological evolution.

It is certainly important to be looking for cures to medical disorders, but it is equally important to conduct research on human health and well-being.

Dreams look real, but they're in your mind, so you realize that the physical world is also a construction, which shows that the mind can affect reality in more ways than you can imagine.

From early childhood, I was interested in understanding how the world worked, and assumed I would be some kind of physical scientist or chemist. But the truth was, I didn't know there was another kind of world, the inner world, that was just as interesting, if not more relevant, than what was going on in the outside world.

If you dream you do something, it's as if you actually are doing it from your brain's point of view.