Deep doubts, deep wisdom; small doubts, little wisdom.

Deep doubts, deep wisdom; small doubts, little wisdom.

Doubt is the beginning, not the end, of wisdom.

Doubt is the beginning, not the end, of wisdom.

The believer is happy; the doubter is wise.

The believer is happy; the doubter is wise.

To have doubted one's own first principles, is the mark of a civilized man.

To have doubted one's own first principles, is the mark of a civilized man.

Without question, the greatest invention in the history of mankind is beer. Oh, I grant you that the wheel was read more

Without question, the greatest invention in the history of mankind is beer. Oh, I grant you that the wheel was also a fine invention, but the wheel does not go nearly as well with pizza.

Modest doubt is called the beacon of the wise.

Modest doubt is called the beacon of the wise.

Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her read more

Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.

Who never doubted, never half believed. Where doubt is, there truth is -- it is her shadow.

Who never doubted, never half believed. Where doubt is, there truth is -- it is her shadow.

There lives more faith in honest doubt,
Believe me, than in half the creeds.

There lives more faith in honest doubt,
Believe me, than in half the creeds.