All science is experiential; but all experience must be related back to and derives its its validity from the conditions and context of consciousness in which it arises, i.e., the totality of our nature.

The existence of inherent limits of experience in no way settles the question about the subordination of facts of the human world to our knowledge of matter.

On the other hand, for the whole human being who wills, feels, and represents, external reality is given simultaneously and with as much certitude as his own self.

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.

What man is, only his history tells.

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

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