The knife of historical relativism... which has cut to pieces all metaphysics and religion must also bring about healing.

Ancient metaphysics underwent many changes at the hands of medieval thinkers who brought it in line with the dominant religious and theological movements of their day.

The individual always realizes only one of the possibilities in his development, which could always have taken a different turning whenever he had to make an important decision.

No real blood flows in the veins of the knowing subject constructed by Locke, Hume, and Kant, but rather the diluted extract of reason as a mere activity of thought.

From the perspective of mere representation, the external world always remains only a phenomenon.

What man is, only his history tells.

If we conceive all the changes in the physical world as reducible to the motion of atoms, motions generated by means of the fixed nuclear forces of those atoms, the whole of the world could thus be known by means of the natural sciences.