There is nothing more dreadful than the habit of doubt. Doubt separates people. It is a poison that disintegrates friendships and breaks up pleasant relations. It is a thorn that irritates and hurts; it is a sword that kills.
The believer is happy; the doubter is wise.
Fanaticism is . . . overcompensation for doubt.
A weak man has doubts before a decision; a strong man has them afterwards.
The pragmatist knows that doubt is an art which has to be acquired with difficulty.
Truth is beautiful, without doubt; but so are lies.
Doubt is the father of invention.
I'd rather see folks doubt what's true than accept what isn't.
Doubt is a pain too lonely to know that faith is his twin brother.
Deep doubts, deep wisdom; small doubts, little wisdom.
To have doubted one's own first principles is the mark of a civilized man.
If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his self-approved wisdom.
Doubt is the beginning, not the end, of wisdom.
He who knows nothing, doubts nothing.
The road to perseverance lies by doubt.
Who never doubted, never half believed. Where doubt is, there truth isâit is her shadow.
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.
Laugh at yourself, but don't ever aim your doubt at yourself. Be bold. When you embark for strange places, don't leave any of yourself safely on shore. Have the nerve to go into unexplored territory.
When you doubt, abstain.
No man likes to have his intelligence or good faith questioned, especially if he has doubts about it himself.
I respect faith, but doubt is what gets you an education.
To have doubted one's own first principles, is the mark of a civilized man.
Faith keeps many doubts in her pay. If I could not doubt, I should not believe.
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people s ofull of doubts.
Just think of the tragedy of teaching children not to doubt.