517. Instruction in the heavens differs from instruction on earth in that cognitions are not committed to memory, but to life; for the memory of spirits is in their life, for they receive and imbibe everything that is in harmony with their life, and do not receive, still less imbibe, what is not in harmony with it. For spirits are affections, and are therefore in a human form that is similar to their affections. [2] Being such, they are constantly inspired with the affection of truth with regard to the uses of life; for the Lord provides that every one loves the uses suited to his disposition; and that love is exalted by the hope of becoming an angel. And as all the uses of heaven have relation to the general use, which is on behalf of the Lord's kingdom, which is their fatherland there, and as all special and particular uses are to be valued in proportion as they more closely and fully have regard to that general use, so all of these special and particular uses, which are innumerable, are good and heavenly; therefore with everyone the affection of truth is so conjoined with the affection of use that they act as one; and thereby truth is so implanted in use that the truths they learn to know are truths of use. In this way are angelic spirits instructed and prepared for heaven. [3] The affection of truth that is suited to the use is insinuated by various means, most of which are unknown in the world; chiefly by representatives of uses which in the spiritual world are exhibited in a thousand ways, and with such delights and pleasures that they permeate the spirit from the interiors of his mind to the exteriors of his body, and thus affect the whole. In consequence, the spirit becomes as it were his use. Therefore, when he comes into his society, into which he is initiated by instruction, he is in his life by being in his use.# From these things it can be confirmed that cognitions, which are external truths, do not bring anyone into heaven; but the life itself, which is a life of uses implanted by means of cognitions. # Every good has both its delight and its quality from uses and in accordance with uses; therefore such as the good is, such is the use (n. 3049, 4984, 7038). Angelic life consists in the goods of love and charity, thus in performing uses (n. 454). The Lord, and therefore the angels, have regard to nothing in man but ends which are uses (n. 1317, 1645, 5854). The kingdom of the Lord is a kingdom of uses (n. 454, 696, 1103, 3645, 4054, 7038). Serving the Lord is performing uses (n. 7038). What man is, such are his uses (n. 1568, 3570, 4054, 6571, 6935, 6938, 10284).