II. Eutyches might have been warned by the fate of former heretics.
A like blasphemy, therefore, is to be abhorred in Eutyches, as was once condemned and overthrown by the Fathers in former heretics: and their example ought to have benefited this foolish fellow, in putting him on his guard against that which he could not grasp by his own sense, lest he should render void the peerless mystery of our salvation by denying the reality of human flesh in our Lord Jesus Christ. For, if there is not in Him true and perfect human nature, there is no taking of us upon Him, and the whole of our belief and teaching according to his heresy is emptiness and lying. But because the Truth does not lie and the Godhead is not passible, there abides in God the Word both substances in one Person, and the Church confesses her Saviour in such a way as to acknowledge Him both impassible in Godhead and passible in flesh, as says the Apostle, “although He was crucified through (our) weakness, yet He lives by the power of God.”
Source: Letters (New Advent)