87. What good is, apart from truth, and what truth is, apart from good, can be seen clearly in man. All good in man has its seat in his will, and all truth in his understanding; and the will from its good can do nothing whatever except by means of the understanding; it cannot work, it cannot speak, it cannot feel; all of its virtue and power is by means of the understanding, consequently by means of truth; for the understanding is the receptacle and abode of truth. It is with these precisely as with the action of the heart and lungs in the body. Without the respiration of the lungs not a motion or a sensation is produced by the heart; but both motion and sensation are produced from the heart by the respiration of the lungs, as is evident in the swooning of persons who have been suffocated or have fallen into the water, whose respiration ceases, although the systolic activity of the heart still continues. That such persons have neither motion nor sensation is known. It is the same with the embryo in the mother's womb. This is because the heart corresponds to the will and its various kinds of good, and the lungs to the understanding and its truths.
In the spiritual world the power of truth is especially conspicuous. An angel who is in Divine truths from the Lord, although in body as weak as an infant, can nevertheless put to flight a troop of infernal spirits that look like Anakim and Nephilim, that is, like giants, and can pursue them to hell, and thrust them into their caverns there; and when they emerge therefrom they dare not come near the angel. Those who are in Divine truths from the Lord are in that world like lions, although in body they have no more strength than sheep. Men who are in Divine truths from the Lord have a like power against evils and falsities, and consequently against cohorts of devils, who, regarded in their essence, are nothing but evils and falsities. There is such strength in Divine truth because God is good itself and truth itself; and it was by means of Divine truth that He created the universe; and all the laws of order by means of which He preserves the universe are truths. Therefore it is said in John:
That all things were made by the Word, and without Him was nothing thing made that was made (1:3, 10).
And in David:
By the Word of Jehovah were the heavens made; and all the hosts of them by the breath of His mouth (Ps. 33:6).