John Chrysostom
Then he speaks also of the benefit: "that times of refreshing may come from the presence of the Lord." By this he shows that they are wretched and weighed down by many misfortunes.
For this reason he spoke so, knowing that this word fully accorded with the state of a man who suffers and seeks consolation.
See how he moves forward little by little. In the first speech he indicated the resurrection and the sitting in heaven in a veiled way.
Here he speaks plainly also of His coming: "and that He may send Jesus Christ, who was appointed for you." Then he adds, "that times of refreshing may come."
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Here he speaks in a veiled manner about the resurrection, for those are truly times of refreshing. Paul also desired them when he said, "For we who are in this tent groan, being burdened" (2 Cor 5:4).
Then, showing that Christ is the cause of the times of refreshing, he says, "and that He may send Jesus Christ, who was appointed for you."
"And that He may send." Having said this, he does not say from where He will send Him, but only adds, "whom heaven must receive."
"Appointed." By this he also frightens them, since much still remains to take place.