This does not mean that Peter had not been certain of this before. It means that his certainty received a new and undoubted confirmation in so striking an event as the present one.
The concept of God’s impartiality is further explained by this: in every nation, and therefore not only in the Jewish people, chosen and guided by the Law, but in every Gentile nation, those left by God to walk in their own ways, the one who fears God and acts righteously is acceptable to Him.
That is, the one who acts justly, according to the demands of the natural law of conscience, is well-pleasing to Him. God shows favor to such a person.
The expression of this favor is that such people are brought into the Church of Christ in one way or another, just as Cornelius is now being brought to Christ.
This expression does not mean that one may believe however and whatever one wishes, and still be acceptable to God, provided only that one fears Him and acts according to natural righteousness.
Nor does it mean that Christian faith is unnecessary in order to be acceptable to God.
Judged by the connection of the whole speech and by the event at which it was spoken, it means that God grants such people the means of salvation in Christ.
Such people have the capacity to become Christians. It does not mean that they are blessed without Christ, or receive blessedness outside the Church of Christ.
Thus this saying expresses not religious indifference, but the indifference of nations in the matter of faith in Christ and of attaining through it justification, or righteousness, before God.
The one pleasing to God in every nation becomes righteous before God through Christ. Therefore, in one way or another, he is brought to Christ.
“How then? Is even one belonging to the Persians, for example, acceptable to Him? If he is worthy, then he will be acceptable in such a way as to be counted worthy of the faith.
“Therefore He did not despise the eunuch from Ethiopia. But what, they will say, are we to think of God-fearing people who are nevertheless left in contempt?
“No, no God-fearing person is left in contempt. For no such person can be despised” (Chrysostom).