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.

He would not, with a peremptory tone,
Assert the nose upon his face his own.

He would not, with a peremptory tone,
Assert the nose upon his face his own.

Any belief worth having must survive doubt

Any belief worth having must survive doubt

The believer is happy; the doubter is wise.

The believer is happy; the doubter is wise.

Doubting charms me not less than knowledge.
[It., Non menno che saper, dubbiar m'aggrata.]

Doubting charms me not less than knowledge.
[It., Non menno che saper, dubbiar m'aggrata.]

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.

The road to perseverance lies by doubt.

The road to perseverance lies by doubt.

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.

Doubt is a pain too lonely to know that faith is his twin brother.

Doubt is a pain too lonely to know that faith is his twin brother.