propositions, yet will give him material for thought and may serve to elucidate what we are here specially concerned with.

It is indispensably necessary for the human Understanding to distinguish between the possibility and the actuality of things. The ground for this lies in the subject and in the nature of our cognitive faculties. Such a distinction (between the possible and the actual) would not be given were there not requisite for knowledge two quite different elements, Understanding for concepts and sensible intuition for Objects corresponding to them. If our Understanding were intuitive it would have no objects but those which are actual. Concepts (which merely extend to the possibility of an object) and sensible intuitions (which give us something without allowing us to cognise it thus as an