If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his read more

If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his self-approved wisdom.

Fanaticism is . . . overcompensation for doubt.

Fanaticism is . . . overcompensation for doubt.

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.

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.

When in doubt, don't.

When in doubt, don't.

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.

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.

The fearful unbelief is unbelief in yourself.

The fearful unbelief is unbelief in yourself.

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

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