...when dogma enters the brain, all intellectual activity ceases.

Existence is larger than any model that is not itself the exact size of existence (which has no size).

"Is," "is," "is" — the idiocy of the word haunts me. If it were abolished, human thought might begin to make sense. I don't know what anything "is"; I only know how it seems to me at this moment.

If you want to become a concert pianist, do it every day. You want to be a writer, do it every day. You want to become depressed, think depressing thoughts every day. You want to become an optimist, think a cheerful thought every day. Do it every day.

Only the madman is absolutely sure.

Certitude is seized by some minds, not because there is any philosophical justification for it, but because such minds have an emotional need for certitude.

We look for the Secret - the Philosopher's Stone, the Elixir of the Wise, Supreme Enlightenment, 'God' or whatever...and all the time it is carrying us about...It is the human nervous system itself.