Never say no to an idea - you never know how that idea will ignite another idea.
How could we possibly appreciate the Mona Lisa if Leonardo had written at the bottom of the canvas: 'The lady is smiling because she is hiding a secret from her lover.' This would shackle the viewer to reality, and I don't want this to happen to 2001.
All my life I've always spoiled the things that meant the most to me.
The truth of a thing is in the feel of it, not in the think of it.
Shooting a movie is the worst milieu for creative work ever devised by man.
Don't do anything. Just tolerate me and let me suffer, knowing how you feel.