423. Let something first be said about the conjunction of the understanding and the will, and its being the same thing as the conjunction of good and truth, that being the conjunction that is effected in the world of spirits. Man has an understanding and a will. The understanding receives truths and is formed out of them, and the will receives goods and is formed out of them; therefore whatever a man understands and thinks from his understanding he calls true, and whatever a man wills and thinks from his will he calls good. From his understanding man can think and thus perceive both what is true and what is good; and yet he thinks what is true and good from the will only when he wills it and does it. When he wills it and from willing does it, it is both in his understanding and in his will, consequently in the man. For neither the understanding alone nor the will alone makes the man, but the understanding and will together; therefore whatever is in both is in the man, and is appropriated to him. That which is in the understanding alone is in man, and yet not really in him; it is only a thing of his memory, or a matter of knowledge in his memory about which he can think when in company with others and outside of himself, but not in himself; that is, about which he can speak and reason, and can simulate affections and gestures that are in accord with it.