One word on the relation of rational to empirical psychology. The former, because it sets itself to apply thought to cognise mind and even to demonstrate the result of such thinking, is the higher; whereas empirical psychology starts from perception, and only recounts and describes what perception supplies. But if we propose to think the mind, we must not be quite so shy of its special phenomena. Mind is essentially active in the same sense as the Schoolmen said that God is 'absolute actuosity.' But if the mind is active it must as it were utter itself. It is wrong therefore to take the mind for a processless _ens,_ as did the old metaphysic which divided the processless inward life of the mind from its outward life. The mind, of all things, must be looked at in its concrete actuality, in its energy; and in such a way that its manifestations are seen to be determined by its inward force. 35.] The _third_ branch of metaphysics was Cosmology. The topics it embraced were the world, its contingency, necessity, eternity, limitation in time and space: the laws (only formal) of its changes: the freedom of man and the origin of evil. To these topics it applied what were believed to be thorough-going contrasts: such as contingency and necessity; external and internal necessity; efficient and final cause, or causality in general and design; essence or substance and phenomenon; form and matter; freedom and necessity; happiness and pain; good and evil. The object of Cosmology comprised not merely Nature, but Mind too, in its external complication in its phenomenon--in fact, existence in general, or the sum of finite things. This object however it viewed not as a concrete whole, but only under certain abstract points of view. Thus the questions Cosmology attempted to solve were such as these: Is accident or necessity dominant in the world? Is the world eternal or created? It was therefore a chief concern of this study to lay down what were called general Cosmological laws: for instance, that Nature does not act by fits and starts. And by fits and starts (_saltus_) they meant a qualitative difference or qualitative alteration showing itself without any antecedent determining mean: whereas, on the contrary, a gradual change (of quantity) is obviously not without intermediation.