I reflected that there is nothing less material than money, since any coin whatsoever (let us say a coin worth twenty centavos)…

“I reflected that there is nothing less material than money, since any coin whatsoever (let us say a coin worth twenty centavos) is, strictly speaking, a repertory of possible futures. Money is abstract, I repeated; money is the future tense. It can be an evening in the suburbs, or music by Brahms; it can be maps, or chess, or coffee; it can be the words of Epictetus teaching us to despise gold; it is a Proteus more versatile than the one on the isle of Pharos. It is unforeseeable time, Bergsonian time, not the rigid time of Islam or the Porch.”

–Jorge Luis Borges.The Zahir