They said therefore to him, What then doest thou as a sign that we may see and believe thee? There is a kind of irony in the inquiry, "What doest thou?" There is at least some ironical mystification of the words of Jesus, "If we have not seen, as thou sayest, the sign, which we thought sufficient to induce us to hail thee as our Prophet-King, what sign wilt thou give us now?
If we are to believe on thee, what sign art thou ready to show now that we may see it, and believe thee, i.e. take thy word as trustworthy, and so begin to consider whether it will be safe to believe in, to entrust ourselves to, thee?"
It has been the peculiarity of the Jewish mind in all ages to seek after a sign, to desire some irresistible reason for invincible faith. In certain stages of immaturity and states of unrest we passionately ask for signs even now—for something more than silent words, for more than past memories, for some voice out of heaven, some gleams of glory, that "we may see and believe."
These frames of mind are no whit more reprehensible than the Greek demand for unanswerable argument, for logical harmony, or for sure demonstration. They said to him, What dost thou work? How wilt thou vindicate thy demand for such implicit trust?
This very question has been made into a reason for breaking all historic connection between the miracle of the feeding and the dialogue and discourse before us (Grotius, Kuinoel, B. Bauer, Weisse, and Schenkel).
It is, however, clear that they were still revolving the work of the past day, which Jesus had depreciated per se, and which, apart from the higher lesson it might have conveyed to them, and apart from the wrong conclusion they had been drawing from it, grievously perplexed them, and seemed insufficient to establish the new claim of Jesus.
They, too, begin to depreciate it in comparison with a corresponding sign which Moses had wrought for their fathers. Verily if Moses had been the mediator of the portentous sign of the manna, if Moses had been its real anther, it was a much greater sign than what they witnessed at Bethsaida.
For forty years the miraculous bread had been lavished upon them. Daily and weekly it proved its supernatural character. In quantity, quality, prolongation, and renewal day by day, and in its cessation when they ate the fresh corn of Canaan, they not unnaturally saw something immeasurably more vast and imposing than the offer of a single meal to a little company of five thousand men.
Christ had wrought a τέρας, an ἔργον, but they had not seen the real σημεῖον involved in it. He himself suggested that something entirely different from that meal, and different from their conclusions concerning it was the true "sign."
Let him work the same adequate sign. They are not repudiating all knowledge of the feeding of the five thousand, nor revealing their ignorance of it. They are thrown back on their ingrained passion for supernatural proof, not as yet satisfied by what Christ had done.