No criticism can be brought against a branch of technical science from outside; no thought fitted out with the knowledge of a period and setting its … - Max Horkheimer

Long after Plato’s time the concept of the Ideas still represented the sphere of aloofness, independence, and in a certain sense even freedom, an objectivity that did not submit to ‘our’ interests.

When an active individual of sound common sense perceives the sordid state of the world, desire to change it becomes the guiding principle by which he organizes given facts and shapes them into a theory. The methods and categories as well as the transformation of the theory can be understood only in connection with his taking of sides. This, in turn, discloses both his sound common sense and the character of the world. Right thinking depends as much on right willing as right willing on right thinking.

Spinoza, for example, thought that insight into the essence of reality, into the harmonious structure of the eternal universe, necessarily awakens love for this universe. For him, ethical conduct is entirely determined by such insight into nature, just as our devotion to a person may be determined by insight into his greatness or genius. Fears and petty passions, alien to the great love of the universe, which is logos itself, will vanish, according to Spinoza, once our understanding of reality is deep enough.