Every work of science great enough to be well remembered for a few generations affords some exemplification of the defective state of the art of reas…

- Charles Sanders Peirce

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

- Charles Sanders Peirce

All the greatest achievements of mind have been beyond the power of unaided individuals.

- Charles Sanders Peirce

My language is the sum total of myself.

- Charles Sanders Peirce

The idea does not belong to the soul; it is the soul that belongs to the idea.

- Charles Sanders Peirce

The essence of belief is the establishment of a habit.

- Charles Sanders Peirce

The entire universe is perfused with signs, if it is not composed exclusively of signs.

- Charles Sanders Peirce

Every new concept first comes to the mind in a judgment.

- Charles Sanders Peirce

We cannot begin with complete doubt.

- Charles Sanders Peirce