It’s not a question of my own satisfaction or lack of it, but of the basic purpose of a film, which I believe is one of illumination, of showing the viewer something he can’t see any other way. And I think at times this can be best accomplished by staying away from his own immediate environment. This is particularly true when you’re dealing in a primarily visual experience, and telling a story through the eyes. You don’t find reality only in your own backyard, you know — in fact, sometimes that’s the last place you find it. Another asset about dealing with themes that are either futuristic or historic is that it enables you to make a statement with which you’re not personally blinded; it removes the environmental blinkers, in a sense, and gives you a deeper and more objective perspective.
No, I don’t mind discussing it, on the lowest level, that is, straightforward explanation of the plot. You begin with an artifact left on earth four million years ago by extraterrestrial explorers who observed the behavior of the man-apes of the time and decided to influence their evolutionary progression. Then you have a second artifact buried deep on the lunar surface and programmed to signal word of man’s first baby steps into the universe — a kind of cosmic burglar alarm. And finally there’s a third artifact placed in orbit around Jupiter and waiting for the time when man has reached the outer rim of his own solar system. When the surviving astronaut, Bowman, ultimately reaches Jupiter, this artifact sweeps him into a force field or star gate that hurls him on a journey through inner and outer space and finally transports him to another part of the galaxy, where he’s placed in a human zoo approximating a hospital terrestrial environment drawn out of his own dreams and imagination. In a timeless state, his life passes from middle age to senescence to death. He is reborn, an enhanced being, a star child, an angel, a superman, if you like, and returns to earth prepared for the next leap forward of man’s evolutionary destiny. That is what happens on the film’s simplest level. Since an encounter with an advanced interstellar intelligence would be incomprehensible within our present earthbound frames of reference, reactions to it will have elements of philosophy and metaphysics that have nothing to do with the bare plot outline itself.
A director is a kind of idea and taste machine; a movie is a series of creative and technical decisions, and it’s the director’s job to make the right decisions as frequently as possible. Shooting a movie is the worst milieu for creative work ever devised by man. It is a noisy, physical apparatus; it is difficult to concentrate — and you have to do it from eight-thirty to six-thirty, five days a week. It’s not an environment an artist would ever choose to work in. The only advantage is has is that you must do it, and you can’t procrastinate.