Marx, Philosophy, Onanism

Marxism, they say, is dead. But Marx's intellectual brilliance lives on. Last night, dipping into 'The German Ideology', I came across this searing remark under the heading Philosophy and Reality:
'Philosophy and the study of the actual world have the same relation to each other as masturbation and sexual love'.
A thought that should be meditated on day and night by all the self-abusers who teach in philosophy departments anywhere in our moth-eaten Western world. A thought that harks back to Marx's devastating XI thesis on Feurbach: 'The philosophers have only interpreted the world in various way; the point is to change it.'
Academy philosophy leaves everything, the world, as it is. 'The point is to change the world'.
Huh! That's it. True philosophy is praxis. What Ali Shariati, I think, claimed about Islam. A religion of praxis. And the priest, this marginal, obscure Christian, makes the same claim for the Logos, for Christianity: 'We must change the world.' Christ came to set the old order on fire!
Dig this: onanism was condemned by God in Genesis. Marx was right...