7035. My son, My firstborn, is Israel. That this signifies that they who are in spiritual truth and good have been adopted, is evident from the signification of "son," when said by Jehovah, or the Lord, of those who are of the spiritual church, as being to be adopted (of which presently); from the signification of "firstborn," as being the faith of charity, which is of the spiritual church (see n. 367, 2435, 3325, 4925, 4926, 4928, 4930); and from the representation of Israel, as being the spiritual church (n. 6637). That " My son, My firstborn, Israel," or those who are in spiritual truth and good, that is, who are of the spiritual church, have been adopted, and thus acknowledged as sons, is because the Lord by His coming into the world saved them (n. 6854, 6914); hence also, and likewise by virtue of faith in the Lord, they are called the "firstborn son." These are also meant by the Lord in John:
And other sheep I have, which are not of this fold; them also I must bring, and they shall hear My voice, and there shall be one flock, and one Shepherd (John 10:16).