Capital itself is the moving contradiction…it presses to reduce labour time to a minimum, while it posits labour time, on the other side, as sole measure and source of wealth…it calls to life all the powers of science and of nature…in order to make the creation of wealth independent of the labour time employed on it. On the other side, it wants to use labour time as the measuring rod for the giant social forces thereby created, and to confine them within the limits required to maintain the already created value as value — Karl Marx, Grundrisse