John Chrysostom
After this fearful wonder, the apostles performed many signs. Listen to what signs they were. “And they were all,” he says, “with one accord in Solomon’s Portico.”
From this it is clear that they remained not in a house, but in the temple. It is also clear that they no longer feared to touch the unclean, but simply touched the dead.
And see how strict they were toward their own, while they did not use this authority toward outsiders.
Thus the earth had already become heaven, by their way of life, by their boldness, by the wonders, and by everything else. They were admired like angels, because they paid no regard at all to mockery, threats, or dangers.
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This was not the only reason. It was also because, being exceedingly loving and solicitous, they helped some with money and others by healing their bodies.
How could the apostles have appeared worthy of faith, speaking in simple language, when they preached concerning God the Word, the Creator, the Savior, and the all-wise Teacher? Yet the tongue of the apostles performed wonders. Through the mouths of the apostles the dead were raised, and the lame walked.
That faith follows wonders, Scripture bears witness, saying: “And by the hands of the apostles many signs and wonders were done among the people,” and all were amazed and marveled. “And more than ever believers were added to the Lord, multitudes of men and women” (Acts 5:12, 14; Acts 2:7, 47).
First the wonders shone forth, and after them the teaching followed. So also in the time of the Law, the wonders performed in Egypt came first, proving that God is the Creator.