Thus at every step we are reminded that we by no means rule over nature like a conqueror over a foreign people, like someone standing outside nature - but that we, with flesh, blood and brain, belong to nature, and exist in its midst, and that all our mastery of it consists in the fact that we have the advantage over all other creatures of being able to learn its laws and apply them correctly.
Friedrich EngelsIt is no longer a question anywhere of inventing interconnections from out of our brains, but of discovering them in the facts.
Friedrich Engels