Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but to vigorous debate, and in many respects that's the secret of its success.

Humans are very good at dreaming, although you'd never know it from your television.

The surface of the Earth is the shore of the cosmic ocean. On this shore, we've learned most of what we know. Recently, we've waded a little way out, maybe ankle-deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return, and we can, because the cosmos is also within us. We're made of star stuff. We are a way for the cosmos to know itself.

We live on a mote of dust suspended in a sunbeam

In science it often happens that scientists say, "You know that's a really good argument; my position is mistaken..."

Except for fools and madmen, everyone knows that nuclear war would he an unprecedented human catastrophe.

The understanding of the intent of the artist which I can achieve when high sometimes carries over to when I’m down. This is one of many human frontiers which cannabis has helped me traverse.