Page:Russell - The Problems of Philosophy, 1912.djvu/161

claim on our impartial attention, both are real, and both are important to the meta-physician. Indeed no sooner have we distinguished the two worlds than it becomes necessary to consider their relations.

But first of all we must examine our knowledge of universals. This consideration will occupy us in the following chapter, where we shall find that it solves the problem of a priori knowledge, from which we were first led to consider universals.