John Chrysostom
By this he expresses that the former salvation was not great. Therefore he fittingly added, “so great.”
Now, he says, God will not deliver us from war or give us land and earthly goods. Rather, there will be the destruction of death, the ruin of the devil, the Kingdom of Heaven, and eternal life.
He expressed all this briefly in the words: “if we neglect so great a salvation.”
Next he speaks of the reliability of what was said: “which at first began to be spoken by the Lord.” That is, it took its beginning from the very source, because no man brought this salvation to earth, nor any created power, but the Only-begotten Himself.
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“It was confirmed to us by those who heard Him.” What does “confirmed” mean? It means reliably handed down, or brought into fulfillment. We, he says, have a pledge. It was not destroyed or discontinued, but is preserved and conquers.
The cause of this is the divine power at work.
What does “those who heard” mean? It means that the very ones who heard from the Lord confirmed us. This is something great and reliable.
In the same way Luke also says at the beginning of the Gospel: “Just as those who from the beginning were eyewitnesses and ministers of the Word delivered them to us” (Lk 1:2).
How, then, was it confirmed? What if, someone says, those who heard invented things on their own? To refute such a thought and prove that this grace is not from men, the Apostle adds what follows.