The third division of which the apostle speaks, he calls the "spirit;" and by the spirit he means that life in man which, in his natural state, is in such an embryo condition, that it can scarcely be said to exist at all--that which is called out into power and vitality by regeneration--the perfection of the powers of human nature. And you will observe, that it is not merely the instinctive life, nor the intellectual life, nor the moral life, but it is principally our nobler affections--that existence, that state of being, which we call love. That is the department of human nature which the apostle calls the spirit; and accordingly, when the Spirit of God was given on the day of Pentecost, you will, remember that another power of man was called out, differing from what he had before. That Spirit granted on the day of Pentecost did subordinate to Himself, and was, intended to subordinate to Himself, the will, the understanding, and the affection of man; but you often find these spiritual powers were distinguished from the natural powers, and existed without them. So in the highest state of religious life, we are told, men prayed in the spirit. Till the spirit has subordinated the understanding, the gift of God is not complete--has not done its work. It is abundantly evident that a new life was called out. It was not merely the sharpening of the intellectual powers; it was calling out powers of aspiration and love to God; those affections which have in them something boundless, that are not limited to this earth, but seek their completion in the mind of God Himself. Now, what we have to say respecting this threefold state of man is, it is a state of discord. Let us take up a very simple, popular, every-day illustration. We hear it remarked frequently in conversation of a man, that if only his will were commensurate with his knowledge, he would be a great man. His knowledge is great--his powers are almost unbounded; he has gained knowledge from nearly every department of science; but somehow or other--you cannot tell why--there is such an indecision, such a vacillation about the man, that he scarcely knows what to do, and, perhaps does nothing in this world. You find it remarked, respecting another class of men, that their will is strong, almost unbounded in its strength--they have iron wills, yet there is something so narrow in their conceptions, something so bounded in their views, so much of stagnation in their thoughts, so much of prejudice in all their opinions, that their will is prevented from being directed to anything in a proper manner. Here is the discord in human nature. There is a distinction between the will and the understanding. And sometimes a feeble will goes with a strong understanding, or a powerful will is found in connection with great feebleness or ignorance of the understanding.