Cyrill of Alexandria
Having "zeal for God, but not according to knowledge" (Rom 10:2), they were indignant when they heard from Christ, "I and the Father are one." For what would have prevented Him from being one with the Father if they had believed that He was God by nature? Therefore they tried to stone Him. Answering why they did this, they say that they do not stone Him for any of the good works, but because He blasphemes. Yet, on the contrary, they themselves blasphemed by wishing to stone the true God. They did not know that Jesus could not come in His pure Godhead, but came incarnate from the seed of David. Thus they called the right confession blasphemy. Therefore, when He said, "I and the Father are one," the Jews did not understand who was speaking.
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Looking only at the flesh, they tried to stone Him, bringing against Him the charge of blasphemy. For by the words "I and the Father are one," they say, You make Yourself God by nature. In this one thing alone they understood correctly. Thus the Jews surpass the impious Arians. They affirm that He who dared to say plainly, "I and the Father are one," must necessarily rise to divine dignity. Otherwise, how could He be one with God by nature if He Himself were not such? Since He does not lie, being Himself truly God by nature, He is also one with the Father. And how could such a One be made or created? In the words "I and the Father are one" there is an indication not of unity of will, but of unity of essence. The Jews understood this also, namely that by saying this Jesus calls Himself God and equal to the Father. Christ did not deny that He had said it in precisely the sense in which they understood it. When our Savior said in conversation, "I and the Father are one," the Jews became angry. They did not understand who He was who said this, and they looked only at the flesh. Then they wished to stone Him and even made the attempt, already accusing Him of blasphemy. "For by saying, 'I and the Father are one,' You make Yourself God by nature," they say. This alone they understood correctly. Therefore even the Jews, who affirm that one who dares to say, "I and the Father are one," as it were necessarily ascends to divine dignity, are better than the impious Arians. For how could He be one with God by nature if He Himself were not such? Since He does not lie, it follows that He Himself, being God by nature, is one with the Father. And how can such a One be made or created?