Joseph Dietzgen

“The spiritualist or the idealist believes in a spiritual essence of force; spiritual, that is to say phantomatic, inexplicable. The man of materialist science is an unbeliever. Nowhere does a scientific justification exist either for belief or unbelief. Materialism has the advantage that it is not seeking the transcendental, the essence, the cause, the force behind phenomena nor that beyond matter. But when he misconstrues the distinction between force and matter, when he denies the existence of the whole problem, he merely slips around behind idealism. The materialist asserts the real indivisibility of matter and force and to explain their seperation, gives value solely to "an exterior reason, born of the need for systemisation of our consciousness.”

“[T]he heart is a very unreliable coinpass, and even will and knowledge, as all ideological factors in general, are not to be trusted as guides if they are without any material basis…. [I]t is not love nor help which is the guiding rule of our time, but hammer or anvil. In reality it is thus: who does not want to be a servant must try to become a master. Under such conditions it is idle to hope that people will sacrifice realities for ideal precepts. We are not sentimental enough to expect such things. Though we use moral arguments in our struggle against the bourgeois, we do all we can to stimulate our class consciousness.”