Selection from Divine Love and Wisdom ~ Emanuel Swedenborg
In the Lord the three degrees of height are infinite and uncreate, but in man the three degrees are finite and created.In the Lord the three degrees of height are infinite and uncreate, because the Lord is Love itself and Wisdom itself; and because the Lord is Love itself and Wisdom itself, He is also Use itself. For love has use for its end, and brings forth use by means of wisdom; for without use, love and wisdom have no boundary or end, that is, no home of their own, consequently they cannot be said to have being and have form unless there be use in which they may be. These three constitute the three degrees of height in subjects of life. These three are like first end, middle end which is called cause, and last end which is called effect.
In man there are these three degrees can be seen from the elevation of his mind even to the degrees of love and wisdom in which angels of the second and third heavens are; for all angels were born men; and man, as regards the interiors pertaining to his mind, is a heaven in least form; therefore there are in man, by creation, as many degrees of height as there are heavens. Moreover, man is an image and likeness of God; consequently these three degrees have been inscribed on man, because they are in God-Man, that is, in the Lord. That in the Lord these degrees are infinite and uncreate, and in man finite and created - that the Lord is Love and Wisdom in Himself; and that man is a recipient of love and wisdom from the Lord; also, that of the Lord nothing but what is infinite can be predicated, and of man nothing but what is finite.
These three degrees with the angels are called Celestial, Spiritual, and Natural; and for them the celestial degree is the degree of love, the spiritual the degree of wisdom, and the natural the degree of uses. These degrees are so called because the heavens are divided into two kingdoms, one called the celestial, the other the spiritual, to which is added a third kingdom wherein are men in the world, and this is the natural kingdom. Moreover, the angels of whom the celestial kingdom consists are in love; the angels, of whom the spiritual kingdom consists are in wisdom; while men in the world are in uses; therefore these kingdoms are conjoined.
(Divine Love and Wisdom 230-232)