3373. And unto thy seed. That this signifies truth, is evident from the signification of "seed," as being truth (see n. 29, 255, 1025, 1447, 1610, 1940, 2848, 3310); thus it signifies the truth which is from the Lord's Divine, which is "thy seed." They who apprehend the Word only according to the sense of the letter cannot know but that "seed" denotes posterity, consequently here the posterity of Isaac from Esau and Jacob, and chiefly from Jacob, because the Word was in that nation and it contains so many historical facts concerning them. But in the internal sense by "seed" there is not meant any posterity from Isaac, but all those who are sons of the Lord, thus the sons of His kingdom, or what is the same, who are in good and truth from the Lord; and because these are "seed," it follows that the very good and truth from the Lord are "seed," for hence come the sons; wherefore also the very truths from the Lord are called the "sons of the kingdom," in Matthew:
He that soweth the good seed is the Son of man; the field is the world; the good seed are the sons of the kingdom (Matt. 13:37-38);
hence also by "sons" in general are signified truths (n. 489, 491, 533, 1147, 2623).
 Everyone who thinks somewhat more deeply or interiorly may know that in the Divine Word by the "seed of Abraham, of Isaac, and of Jacob," so often mentioned, and concerning which it is so frequently said that it should be blessed, and this above all nations and people in the world, cannot be signified their posterity; for above all nations they were least of all in the good of love to the Lord and of charity toward the neighbor, and were not even in any truth of faith; for they were utterly ignorant of what the Lord is, what His kingdom, thus what heaven is, and what the life after death, both because they did not want to know, and because if they had learned about these things, they would at heart have totally denied them, and would thus have profaned interior goods and truths, just as they so frequently profaned exterior ones by becoming open idolaters; which is the reason why in the sense of the letter of the Word of the Old Testament any interior things so rarely stand forth to view. Being of this nature, the Lord has said concerning them, quoting Isaiah:
He hath blinded their eyes, and hardened their heart, lest they should see with their eyes and understand with their heart, and should be converted, and I should heal them (John 12:40);
and again when they said:
We are Abraham's seed; Abraham is our father; Jesus said unto them, If ye were Abraham's sons, ye would do the works of Abraham; ye are of your father the devil, and the desires of your father ye will to do (John 8:33, 39, 44);
by "Abraham" here is meant the Lord, as everywhere in the Word; and that the Jews were not his seed, or sons, but the seed of the devil, is plainly stated. All this shows very plainly that by the "seed of Abraham, of Isaac, and of Jacob" as mentioned in the historical and prophetical Word, are by no means meant their posterity-for the Word throughout is Divine-but all those who are the Lord's "seed," that is, who are in the good and truth of faith in Him. (That from the Lord alone comes heavenly seed, that is, all good and truth, may be seen above n. 1438, 1614, 2016, 2803, 2882-2883, 2891-2892, 2904, 3195.)