Playboy: Much of the controversy surrounding 2001 deals with the meaning of the metaphysical symbols that abound in the film — the polished black monoliths, the orbital conjunction of Earth, Moon and sun at each stage of the monoliths’ intervention in human destiny, the stunning final kaleidoscopic maelstrom of time and space that engulfs the surviving astronaut and sets the stage for his rebirth as a “star-child” drifting toward Earth in a translucent placenta. One critic even called 2001 “the first Nietzschean film,” contending that its essential theme is Nietzsche’s concept of man’s evolution from ape to human to superman. What was the metaphysical message of 2001?
Kubrick: It’s not a message that I ever intend to convey in words. 2001 is a nonverbal experience; out of two hours and 19 minutes of film, there are only a little less than 40 minutes of dialog. I tried to create a visual experience, one that bypasses verbalized pigeonholing and directly penetrates the subconscious with an emotional and philosophic content. To convolute McLuhan, in 2001 the message is the medium. I intended the film to be an intensely subjective experience that reaches the viewer at an inner level of consciousness, just as music does; to “explain” a Beethoven symphony would be to emasculate it by erecting an artificial barrier between conception and appreciation. You’re free to speculate as you wish about the philosophical and allegorical meaning of the film — and such speculation is one indication that it has succeeded in gripping the audience at a deep level — but I don’t want to spell out a verbal road map for 2001 that every viewer will feel obligated to pursue or else fear he’s missed the point. I think that if 2001 succeeds at all, it is in reaching a wide spectrum of people who would not often give a thought to man’s destiny, his role in the cosmos and his relationship to higher forms of life. But even in the case of someone who is highly intelligent, certain ideas found in 2001 would, if presented as abstractions, fall rather lifelessly and be automatically assigned to pat intellectual categories; experienced in a moving visual and emotional context, however, they can resonate within the deepest fibers of one’s being.
— Playboy’s interview with Stanley Kubrick in its entirety (1968)