is to say that it follows an immanent principle, that it is independent of foreign influences,--in a word, that it is self-determined. But here again it seems as if Leibniz had stated a principle altogether too wide to throw any light upon the nature of moral freedom. Spontaneity is no more an attribute of human activity than it is of all real activity. Every monad, even the unconscious, as truly follows its own law without interference from without as does man himself. If the spontaneity of action constitutes its morality, we are not in a condition to ascribe morality to man any more than to any real thing. We are thus thrown back again upon the conception of rationality as the final and decisive trait of freedom and of ethical conduct. Just as "contingency" gets a moral import only in connection with conscious ends of action, so "spontaneity" comes within the moral realm only when conjoined to reason. Why is there this close connection between reason and freedom? The reader has only to recall what was said of Leibniz's theory of causality to get a glimpse into their unity. Causality is not a matter of physical influence, but of affording the reason in virtue of which some fact is what it is. This applies of course to the relation of the soul and the body. "So far as the soul is perfect and has distinct ideas, God has accommodated the body to it; so far as the soul is imperfect and its ideas are confused, God has accommodated the soul to the body. In the former case the body always responds to the demands of the soul; in the latter the soul is moved by the passions which are born of the sensuous ideas. Each is thought to act upon the other in the measure of its perfection [that is, degree of activity], since God has adjusted one thing to another according to its perfection or imperfection. Activity and passivity are always reciprocal in created things, because a portion of the reasons which serve to explain what goes on is in one substance, and another portion in the other. This is what makes us call one active, the other passive." If we translate these ideas out of their somewhat scholastic phraseology, the meaning is that the self-activity of any substance is accurately measured by the extent to which it contains the reasons for its own actions; and conversely, that it is dependent or enslaved just so far as it has its reasons beyond itself. Sensations, sensuous impulses, represent, as we have seen before, the universe only in a confused and inarticulate way. They are knowledge which cannot give an account of itself. They represent, in short, that side of mind which may be regarded as affected, or the limitation of mind,--its want of activity. So far as the mind acts from these sensations and the feelings which accompany them, it is ideally determined from without; it is a captive to its own states; it is in a condition of passivity. In all action, therefore, which occurs from a sensuous basis, the soul is rightly regarded as unfree.