The past cannot remember the past. The future can't generate the future. The cutting edge of the instant right here and now is always nothing less than the totality of everything there is.

... the laws of physics and of logic ... the number system ... the principle of algebraic substitution. These are ghosts. We just believe in them so thoroughly they seem real.

It's so hard when contemplated in advance, and so easy when you do it.

Great minds struggle to cure diseases so that people may live longer, but only madmen ask why. One lives longer in order that he may live longer. There is no other purpose.

If there were only one person in the world, is there any way he could be insane?

A motorcycle functions entirely in accordance with the laws of reason, and a study of the art of motorcycle maintenance is really a miniature study of the art of rationality itself.

Like those in the valley behind us, most people stand in sight of the spiritual mountains all their lives and never enter them, being content to listen to others who have been there and thus avoid the hardships.