Value cannot be forged like a hammer, nor woven like a piece of linen.

Value cannot be forged like a hammer, nor woven like a piece of linen. If it could, our industries would be spared those frightful convulsions called crises, which have no other cause than that quantities of products, though manufactured to technical perfection, cannot achieve the value expected. The most that production can do is to create goods in the hope that, according to the anticipated relations of demand and supply, they will be of value. (Böhm-Bawerk, I, pp. 90-91, italics original)