Neither can they die any more: for they are equal unto the angels; and are the children of God, being the children of the resurrection.
Read Chapter 20
Clement Of Alexandria
AD 215
And the latter terminating in love, thereafter gives the loving to the loved, that which knows to that which is known. And, perchance, such an one has already attained the condition of "being equal to the angels."
They are equal unto the angels. So the Arabic, Syriac, Egyptian, Persian, and Ethiopic; equal in celibacy, immortality, glory. As therefore the angels do not marry nor generate, so neither do the Blessed, because, being immortal per se, and glorious, they will remain for ever. For generation is desired in this life, because of death; as a mortal father might, as it were, survive and endure in the son whom he leaves alive. So S. Cyril: "As the angels are not of generation, so they who rise again will have no need of marriage." S. Chrysostom on Matt. xxiii: "Wives are married that the diminution, which is by death, may be supplied by birth. But death will not be there, and, in consequence, neither marriages, nor wives, nor generation."
And are, &c. "They are called the children of God," says Theophylact, "as being born again through the Resurrection, not only through grace, but also through glory, that they may thus resemble God most closely, as is taught by S. John , 1Ep. iii2. Then as...
The children of resurrection; i.e. of the just, who shall rise to a happy resurrection: not but that the wicked shall also rise, but to their condemnation and greater misery. (Witham)
Jesus Christ begins with stating the wide difference between the state of things in this mortal life and in that which is to come: that marriage necessary here, will be unnecessary hereafter. For, in this life, they are children of men, subject to death, and therefore under the necessity of continuing their race by generation; but in the next life, they shall be children of resurrection, living for eternity, never to die, and consequently sons of God, and immortal. Resurrection is a kind of regeneration to immortality. Hence St. Paul explains to our Saviour's rising again, these words of the 2nd Psalm: Thou art my Son, this day have I begotten thee. (Calmet)
My God, however, who formed that which He had taken out of the dust of the ground in the true quality of flesh, although not issuing as yet from conjugal seed, was equally able to apply to angels too a flesh of any material whatsoever, who built even the world out of nothing, into so many and so various bodies, and that at a word! And, really, if your god promises to men some time or other the true nature of angels.
in order, indeed, that it may be rendered a fit substance for the kingdom of God. "For we shall be like the angels.".
To this discussion, however, our Lord's declaration puts an effectual end: "They shall be "says He, "equal unto the angels.".
No restoration of marriage is promised in the day of the resurrection, translated as they will be into the condition and sanctity of angels.