Bede the Venerable — as excerpted in the Catena Aurea on Luke 20:1-8

“As if He should say, He whom yon confess had his gift of prophecy from heaven, and gave testimony to Me. And ye heard from him by what power I should do these things. It follows, But if we shall say, Of men; the whole people will stone us: for they be persuaded that John was a prophet. Therefore perceived they in whatever way they should answer they would fall into a trap, fearing the stoning, but much more the confession of the truth. And then it follows, And they answered, that they could not tell whence it was. Because they will not confess that which they knew, they were baffled, and the Lord would not tell them what He knew; as it follows, And Jesus said unto them, Neither will I tell you by what authority I do these things. For there are two reasons especially why we should conceal the truth from those that ask; for example, when the questioner is incapable of understanding what he asks, or when from hatred or contempt he is unworthy to have his questions answered.”