I reflected that there is nothing less material than money, since any coin(a twenty centavo piece, for instance) is, in truth, a panoply of all possible futures. Money is abstract, I said over and over, money is future time. It can be an evening just outside the city, or a Brahms melody, or maps, or chess, or coffee, or the words of Epictetus, which teach the contempt of gold; it is a Proteus more changeable than the Proteus of the Isle of Pharos. It is unforeseeable time, Bergsonian time, not the hard, solid time of Islam or the Portico.
The Zahir
Jorge Luis Borges