Genesis 18:3

8. From this arises the question as to angels, whether they have bodies adapted to their duties and their swift motions from place to place, or are only spirits? For if we say that they have bodies, we are met by the passage: “He maketh His angels spirits;” and if we say that they have not bodies, a still greater difficulty meets us in explaining how, if they are without bodily form, it is written that they appeared to the bodily senses of men, accepted offers of hospitality, permitted their feet to be washed, and used the meat and drink which was provided for them. For it seems to involve us in less difficulty, if we suppose that the angels are there called spirits in the same manner as men are called souls, e.g. …

God appeared again to Abraham at the oak of Mamre in three men, who it is not to be doubted were angels, although some think that one of them was Christ, and assert that He was visible before He put on flesh. Now it belongs to the divine power, and invisible, incorporeal, and incommutable nature, without changing itself at all, to appear even to mortal men, not by what it is, but by what is subject to it. And what is not subject to it? Yet if they try to establish that one of these three was Christ by the fact that, although he saw three, he addressed the Lord in the singular, as it is written, “And, lo, three men stood by him: and, when he saw them, he ran to meet them from the tent-door, and worshipped toward the ground, and said, Lord, if I have found favor before thee,” etc.; why do they not advert to this also, that when two of them came to destroy the Sodomites, while Abraham still …

(Recapitulation.) “Out of the city.” ( v. 13 .) The place was convenient for hearing the word, aloof from troubles and dangers. ( b ) “On the sabbath.” As there was no work going on, they were more attentive to what was spoken. (a) “And a certain woman, named Lydia, a seller of purple” ( v. 14 ): observe how the writer of the history is not ashamed of the occupations (of the converts): ( c ) moreover neither was this city of the Philippians a great one. Having learnt these things, let us also be ashamed of no man. Peter abides with a tanner ( ch. ix. 43 ): (Paul) with a woman who was a seller of purple, and a foreigner. Where is pride? “Whose heart the Lord opened.” Therefore we need God, to open the heart: but God opens the hearts that are willing: for there are hardened hearts to be seen. …

(Recapitulation.) “Silver, or gold, or apparel,” etc. ( ch. xx. 33, 34; 1 Cor. ix; 2 Cor. xi .) So then, it was not in Corinth only that they did this, they that corrupted the disciples, but in Asia as well. But he nowhere casts this up as a reproach to the Ephesians, when writing to them. And why? Because he did not fall upon any subject that obliged him to speak of this. But to the Corinthians he says, “My boasting has not been stopped in the regions of Achaia.” ( 2 Cor. xi. 10 .) And he does not say, Ye did not give to me; but, “Silver, or gold, or apparel, I coveted not,” that it might not seem to be their doing, that they had not given. And he does not say, From no man have I coveted the necessaries of life, that again it might not look like accusing them: but he covertly hints as much, seeing that he provided subsistence for others as well as himself. …

Thus did Lot, thus Abraham. For he spent the whole day upon it, waiting for this goodly prey, and when he saw it, leaped upon it, and ran to meet them, and worshipped upon the ground, and said, “My Lord, if now I have found favor in Thy sight, pass not away from Thy servant.” ( Gen. xviii. 3 .) Not as we do, if we happen to see a stranger or a poor man, knitting our brows, and not deigning even to speak to them. And if after thousands of entreaties we are softened, and bid the servant give them a trifle, we think we have quite done our duty. But he did not so, but assumed the fashion of a suppliant and a servant, though he did not know who he was going to take under his roof. But we, who have clear information that it is Christ Whom we take in, do not grow gentle even for this. But he both beseeches, and entreats, and falls on his knees to them, yet we insult those that come to us. …

104. This especially was Abraham’s praise, for he watched at the door of his tent, that no stranger by any chance might pass by. He carefully kept a lookout, so as to meet the stranger, and anticipate him, and ask him not to pass by, saying: “My lord, if I have found favour in thy sight, pass not by thy servant.” Therefore as a reward for his hospitality, he received the gift of posterity.

80. The heathen king saw in the fire, together with the three Hebrew children, the form of a fourth, like as of an angel, and because he thought that this angel excelled all angels, he judged Him to be the Son of God, Whom he had not read of, but in Whom he believed. Abraham, also, saw Three, and adored One.