Acts 12:17

“How free from vainglory he is! He did not say "make it known everywhere," but rather "notify... the brethren." He went out and went to another place because he did not want to test God and lead himself into temptations. The Angel did not tell him about this; but by the fact that he left him in silence and led him out of the prison by night, he gave him permission to withdraw, since the apostles had already done what they had been commanded — to go to the temple and preach to the people.”

“He went into another place. Did not think fit to stay in the city of Jerusalem. St. Chrysostom takes notice, that upon another occasion, when he was delivered by an Angel out of prison, he went boldly the next day, and preached in the temple. (chap. v. 19.) but there he was ordered by an Angel so to do; now to stay without such orders, would have been rashly to expose himself, and in a manner tempting God. (Witham) — Peter retired to another place, that he might not rashly expose himself to future danger. It is not just to depend on supernatural assistance, when human means are adequate to the effect. (St. Chrysostom, hom. xxvi.) — St. Peter desires they will announce his miraculous deliverance to James, the then bishop of Jerusalem, and to the Christians, that they might see the effect of their prayers for him. St. James had, beyond a doubt, ordered general supplications to be made by all the brethren for St. Peter. (Bristow)”

“But he, beckoning . . . with his hand to hold their peace--a lively touch this. In the hubbub of joyful and wondering interrogatories there might mingle reflections, thrown out by one against another, for holding out so long against the testimony of Rhoda; while the emotion of the apostle's own spirit would be too deep and solemn to take part in such demonstrations or utter a word till, with his hand, he had signified his wish for perfect silence. Go show these things unto James and to the brethren--Whether James the son of Alpheus, one of the Twelve, usually known as "James the Less," and "James the Lord's brother" (Gal 1:19), were the same person; and if not, whether the James here referred to was the former or the latter, critics are singularly divided, and the whole question is one of the most difficult. To us, it appears that there are strong reasons for thinking that they were not the same person, and that the one here meant, and throughout the Acts, is the apostle James. (But on this more hereafter). James is singled out, because he had probably begun to take the oversight of the Church in Jerusalem, which we afterwards find him exercising (Acts 15:1-29). And he departed, and went into another place--according to his Lord's express command (Mat 10:23). When told, on a former miraculous liberation from prison, to go and speak unto the people (Act 5:20), he did it; but in this case to present himself in public would have been to tempt God by rushing upon certain destruction.”

“"And Peter, departed and went to another place." For he was not testing God. It would, however, have been possible for God at the same time to snatch away the guards. But if this were so, it would have been thought an escape. For rather it grieved him to be mocked, just like the time that his grandfather was made to look ridiculous by the magi. (see Matt. 2:16) [Why, then, are flatterers not also punished? Both were worthy of punishment. But since there is no time for judgment, the most responsible is punished.] [CHRYSOSTOM]”