The Commens Dictionary
Quote from ‘On Quantity, with special reference to Collectional and Mathematical Infinity’
… Philosophy, which makes no special observations, but uses facts commonly known. In order to be exact, it must rest on mathematical principles. It divides into Logic, which studies the world of thought, and Metaphysics, which studies the world of being; and the latter must rest upon the principles of the former.
‘Metaphysics’ (pub. 04.02.13-20:28). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-quantity-special-reference-collectional-and-mathematical-infinity.