Society does not consist of individuals but expresses the sum of interrelations, the relations within which these individuals stand.
Karl MarxNatural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.
Karl MarxThe true law of economics is chance, and we learned people arbitrarily seize on a few moments and establish them as laws.
Karl MarxSurplus-value and the rate of surplus-value are... the invisible essence to be investigated, whereas the rate of profit and hence the form of surplus-value as profit are visible surface phenomena
Karl Marx