Proudhon, Pierre Joseph. System of Economical Contradictions: or, the Philosophy of Misery Electronic Text Center, University of Virginia Library Chapter 2 CHAPTER II. OF VALUE. 1. -- Opposition of value in USE and value in EXCHANGE. Value is the corner-stone of the economic edifice. The divine artist who has entrusted us with the continuation of his work has explained himself on this point to no one; but the few indications given may serve as a basis of conjecture. Value, in fact, presents two faces: one, which the economists call value in use, or intrinsic value; another, value in exchange, or of opinion. The effects which are produced by value under this double aspect, and which are very irregular so long as it is not established, -- or, to use a more philosophical expression, so long as it is not constituted, -- are changed...