There seems no doubt that these things of which I have tried to give a rational account are, in a sense, beliefs, and stubbornly held ones, of many people at a primitive level of reflection, and of some philosophers at a more sophisticated level of reflection; though many other philosophers, at a perhaps still more sophisticated level, have rejected, or seem to reject, them. It is difficult to see how such beliefs could be argued for except by showing their consonance with the conceptual scheme which we operate, by showing how they reflect the structure of that scheme. So if metaphysics is the finding of reasons, good, bad or indifferent, for what we believe on instinct, then this has been metaphysics.