If you really want to communicate something, even if it’s just an emotion or an attitude, let alone an idea, the least effective and least enjoyable way is directly. It only goes in about an inch. But if you can get people to the point where they have to think a moment what it is you’re getting at, and then discover it, the thrill of discovery goes right through the heart.

The destruction of this planet would have no significance on a cosmic scale.

I will say that the God concept is at the heart of 2001 but not any traditional, anthromorphic image of God. I don't believe in any of Earth's monotheistic religions, but I do believe that one can construct an intriguing scientific definition of God, once you accept the fact that there are approximately 100 billion stars in our galaxy alone, that each star is a life-giving sun and that there are approximately 100 billion galaxies in just the visible universe.

The world's religions, for all their parochialism, did supply a kind of consolation for this great ache. This shattering recognition of our mortality is at the root of far more mental illness than I suspect even psychiatrists are aware.

The most terrifying fact about the universe not that it is hostile but that it is indifferent

You're an idealist, and I pity you as I would the village idiot.

One man writes a novel. One man writes a symphony. It is essential that one man make a film.