Jerome : (Verse 23) Announce what will happen in the future, and we will know that you are gods. Do good or do evil, if you can, and let us talk and see together. LXX: Also, tell us what is to come, and announce to us what will happen in the end: and we will know that you are gods. Do good and evil, and we will admire: and we will see at the same time where you are, and where your work is. Another indication is that idols are not gods, because they can neither do good nor do evil. Not that idols, or demons sitting on idols, have often not done evil; but rather, unless power has been granted to them by the Lord, they cannot do this. Finally, they implore in the Gospel to have power over a herd of pigs (Matthew VIII). And in Job we read, without the Lord's command (Diabolus) that a holy man was not even able to destroy animals and possessions. And it is not surprising that this is true about God, for the Apostle Paul also teaches that certain people belong to Satan, so that they may learn not to blaspheme. — Commentary on Isaiah