John Chrysostom
Again, this happened when there was still neither temple nor sacrifice. "With the Angel," he says, "he received living words to give to us." By this he shows that Moses not only worked signs, but also gave the law, as Christ did.
As Moses first works signs and then gives the law, so also does Christ. "This is he who was in the assembly in the wilderness with the Angel who spoke to him." See how again he indicates that Christ gave the law.
For He was with him, Moses, in the assembly in the wilderness. Here Stephen also recalls the great wonder that happened on Mount Sinai.
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"And who received living words." Moses is wondrous in everything, but especially when it was necessary to give the law. What does "living words" mean? He means those whose fulfillment was unfolded in his words, or prophecies.
He rightly said "living words," showing thereby that there are also words that are not living. Ezekiel mentions them when he says, "and I gave them statutes that were not good" (Ezek 20:25). In contrast to such words he added, "living."
Do not marvel, he says, that Christ does good even to those who reject His Kingdom. The same was true under Moses. He brought them not only out of Egypt, but also through their wanderings in the wilderness.
Do you see that those signs too were for them? Stephen proves that the prophecy of the one who conversed with God must certainly be fulfilled. He was saved in a wondrous manner, did so much, and had such power. He cannot contradict himself.
Yet let us return to what was said above. This is that Moses who said, "The Lord God will raise up for you a Prophet like me." It seems to me that Christ also pointed to this saying when He said, "For salvation is from the Jews" (Jn 4:22), meaning Himself.
"This is he who was in the assembly in the wilderness with the Angel who spoke to him." See how again he indicates that Christ gave the law. He was with him, Moses, in the assembly in the wilderness.
The word also means "church."