340. Many may suppose that in heaven little children remain little children, and continue as such among the angels. Those who do not know what an angel is may have had this opinion confirmed by paintings and images in churches, in which angels are represented as children. But it is wholly otherwise. Intelligence and wisdom are what constitute an angel, and as long as children do not possess these they are not angels, although they are with the angels; but as soon as they become intelligent and wise they become angels; and what is wonderful, they do not then appear as children, but as adults, for they are no longer of an infantile genius, but of a more mature angelic genius. Intelligence and wisdom produce this effect. The reason why children appear more mature, thus as youths and young men, as they are perfected in intelligence and wisdom, is that intelligence and wisdom are essential spiritual nourishment;# and thus the things that nourish their minds also nourish their bodies, and this from correspondence; for the form of the body is simply the external form of the interiors. But it should be understood that in heaven children advance in age only to early manhood, and remain in this to eternity. That I might be assured that this is so I have been permitted to talk with some who had been educated as children in heaven, and had grown up there; with some also while they were children, and again with the same when they had become young men; and I have heard from them about the progress of their life from one age to another.
# Spiritual food is knowledge, intelligence, and wisdom, thus the good and truth from which these are (n. 3114, 4459, 4792, 5147, 5293, 5340, 5342, 5410, 5426, 5576, 5582, 5588, 5655, 8562, 9003).
Therefore in a spiritual sense everything that comes forth from the mouth of the Lord is food (n. 681).
Because bread means all food in general it signifies every good, celestial and spiritual (n. 276, 680, 2165, 2177, 3478, 6118, 8410).
And for the reason that these nourish the mind, which belongs to the internal man (n. 4459, 5293, 5576, 6277, 8410).