Acts 2:21

But what next? He again lets them take breath, adding, "And it shall come to pass, that whosoever shall call upon the name of the Lord, shall be saved." This is said concerning Christ, as Paul affirms, but Peter does not venture as yet to reveal this.

"And it shall come to pass, every one who shall call upon the name of the Lord shall be saved. Every one," he says: though he be priest (but he does not yet reveal the meaning), though bond, though free. For there is no male nor female in Christ Jesus, no bond, no free. Well may it be so, for all these are but shadow. For if in king's palaces there is no high-born nor low-born, but each appears according to his deeds; and in art, each is shown by his works; much more in that school of wisdom. "Every one who shall invoke." Invoke: not any how, for it is written, "Not every one that saith unto Me, Lord, Lord:" but with inward earnest affection, with a life more than commonly good, with the confidence which is meet. Thus far, however, he makes the discourse light, by introducing that which relates to faith, and that terrible which relates to the punishment. For in the invocation is the salvation.

What, I pray you, is this you say? Do you talk of salvation for them after the Cross? Bear with me a little. Great is the mercy of God. And this very fact does, no less than the resurrection, prove him to be God, yea, no less than His miracles-the fact that He calls these to Him. For surpassing goodness is, above all things, peculiarly God's own. Therefore also He says, "None is good save one, that is, God." Only let us not take this goodness for an occasion of negligence. For He also punishes as God.

Now, "The sun shall be turned into darkness," and the preceding, "blood and fire and vapor of smoke," these refer to the coming judgment. More appropriately and specifically they speak of Jerusalem and its then captivity, as is shown by the nature of those suffering. Likewise, according to Josephus, many such things foreshadowed the destruction of Jerusalem. That the moon is said to be turned into blood signifies the excess of slaughter, being nearer to the earth and able to suffer this from the exhalation of blood. As for, "before the great and notable day of the Lord shall come," is terrifying and alarming because of the expected dangers. For he says, do not be confident in the fact that you now sin with liberty; but know that these are preludes to that great and dangerous retribution of deeds which will follow, adding, "And everyone who shall call upon the name of the Lord shall be saved." (Rom. 10:13) For Paul the apostle says this was said concerning Christ: but now, since there is no opportunity for that here, in a certain exemption of speech he postponed this.

And it shall be: Everyone who calls upon the name of the Lord shall be saved. This is what Peter says elsewhere: For God is not a respecter of persons, but in every nation, whoever fears Him and works righteousness is accepted by Him (Acts X).

But the Lord says: "I will pour out of My Spirit… before the great day of the Lord comes." Say to the Jew: "If the Godhead has one person and one name, and if God speaks of Himself, then why did He not say: 'before My day comes'?" If, says Peter, you sin now with impunity, do not place your hope in this, because this is only the beginning of that great and difficult day. Having moved and frightened their hearts by this, he calms them and allows them to nourish good hopes. "And it shall come to pass that whoever calls on the name of the Lord shall be saved." But not simply calls, because it is said: "Not everyone who says to Me, 'Lord, Lord!'" (Matt. 7:21), no, but whoever calls with sincerity and with a good life. Having now included in his speech a word about faith (about the necessity of faith), because salvation depends on calling upon, he makes his speech easy to understand. The name of the Lord, according to Paul's explanation, is called upon in the name of Christ, but Peter on this occasion did not venture to reveal this to his listeners.