Doubt Quotes

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These are quotes tagged with "doubt".

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Men become civilized, not in proportion to their willingness to believe, but in proportion to their readiness to doubt.

Doubt, indulged and cherished, is in danger of becoming denial; but if honest, and bent on thorough investigation, it may soon lead to full establishment of the truth.
Doubt is the vestibule through which all must pass before they can enter into the temple of wisdom.
Philosophy when superficially studied, excites doubt, when thoroughly explored, it dispels it.
When in doubt, ask. When not in doubt, ask.
There lives more faith in honest doubt, Believe me, than in half the creeds.
Doubt is the key to knowledge.
Doubt, the essential preliminary of all improvement and discovery, must accompany the stages of man's onward progress. The faculty of doubting and questioning, without which those of comparison and judgment would be useless, is itself a divine prerogative of the reason.
To doubt is worse than to have lost; And to despair is but to antedate those miseries that must fall on us.
An honest man can never surrender an honest doubt.
Everybody in the world thought we couldn't do it. But we did, dammit. [After winning the America's Cup]
He that knows nothing doubts nothing.
There was a castle called Doubting Castle, the owner whereof was Giant Despair.
If the Sun and Moon should doubt, They'd immediately Go out
Who never doubted, never half believed. Where doubt is, there truth is -- it is her shadow.
Suspicion amongst thoughts are like bats amongst birds, they never fly by twilight.