John Chrysostom

"And he was with them coming in and going out at Jerusalem, and speaking boldly in the name of Jesus" (v. 28): these things were demonstrative of the former, and by his acts he made good what was spoken of him. "And he spake, and disputed with the Hellenists." (v. 29.) So then the disciples were afraid of him, and the Apostles did not trust him; by this therefore he relieves them of their fear. "With the Hellenists:" he means those who used the Greek tongue: and this he did, very wisely; for those others, those profound Hebrews had no mind even to see him.

"And he was with them, coming in and going out at Jerusalem, and speaking boldly in the name of the Lord Jesus." This gave them all confidence. "But they went about to slay him: which when the brethren knew" etc. Do you observe how both there (at Damascus), and here, the rest take care for him, and provide for him the means of departure, and that we nowhere find him thus far receiving direct supernatural aid from God? So the energy of his character is betokened.