No man likes to have his intelligence or good faith questioned, especially if he has doubts about it himself.

No man likes to have his intelligence or good faith questioned, especially if he has doubts about it himself.

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

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

These are bagpipes. I understand the inventor of the bagpipes was inspired when he saw a man carrying an indignant, read more

These are bagpipes. I understand the inventor of the bagpipes was inspired when he saw a man carrying an indignant, asthmatic pig under his arm. Unfortunately, the man-made sound never equalled the purity of the sound achieved by the pig.

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.

A weak man has doubts before a decision; a strong man has them afterwards.

A weak man has doubts before a decision; a strong man has them afterwards.

To believe with certainty we must begin with doubting.

To believe with certainty we must begin with doubting.

Faith keeps many doubts in her pay. If I could not doubt, I should not believe.

Faith keeps many doubts in her pay. If I could not doubt, I should not believe.

The pragmatist knows that doubt is an art which has to be acquired with difficulty.

The pragmatist knows that doubt is an art which has to be acquired with difficulty.

Make me to see't; or at the least so prove it
That the probation bear no hinge nor loop
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Make me to see't; or at the least so prove it
That the probation bear no hinge nor loop
To hang a doubt on--or woe upon thy life!