The real science of modern economy only begins when the theoretical analysis passes from the process of circulation to the process of production.
 Karl Marx, Das Kapital (1894). copy citation

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Author Karl Marx
Source Das Kapital
Topic economy science
Date 1894
Language English
Reference
Note
Weblink https://www.marxists.org/archive/marx/works/download/pdf/Capital-Volume-...

Context

“Partly because merchant's capital is the first free state of existence of capital in general. And partly because of the overwhelming influence which it exerted during the first revolutionising period of feudal production — the genesis of modern production. The real science of modern economy only begins when the theoretical analysis passes from the process of circulation to the process of production. Interest-bearing capital is, indeed, likewise a very old form of capital. But we shall see later why mercantilism does not take it as its point of departure, but rather carries on a polemic against it.” source