Upon the feeding of the four thousand, they demand of Him a sign from heaven. He had wrought for the public no miracle of this peculiar kind. And yet Moses had gone up, in the sight of all Israel, to commune with God in the mount that burned; Samuel had been answered by thunder and rain in the wheat harvest; and Elijah had called down fire both upon his sacrifice and also upon two captains and their bands of fifty. Such a miracle was now declared to be the regular authentication of a messenger from God, and the only sign which evil spirits could not counterfeit. Moreover the demand would specially embarrass Jesus, because He alone was not accustomed to invoke heaven: His miracles were wrought by the exertion of His own will. And perhaps the challenge implied some understanding of what this peculiarity involved, such as Jesus charged them with, when putting into their mouth the words, This is the heir, come, let us kill Him. Certainly the demand ignored much. Conceding the fact of certain miracles, and yet imposing new conditions of belief, they shut their eyes to the unique nature of the works already wrought, the glory as of the Only-begotten of the Father which they displayed. They held that thunder and lightning revealed God more certainly than supernatural victories of compassion, tenderness and love. What could be done for moral blindness such as this? How could any sign be devised which unwilling hearts would not evade? No wonder that hearing this demand, Jesus sighed deeply in His spirit. It revealed their utter hardness; it was a snare by which others would be entangled; and for Himself it foretold the cross. St. Mark simply tells us that He refused to give them any sign. In St. Matthew He justifies this decision by rebuking the moral blindness which demanded it. They had material enough for judgment. The face of the sky foretold storm and fair weather, and the process of nature could be anticipated without miracles to coerce belief. And thus they should have discerned the import of the prophecies, the course of history, the signs of the times in which they lived, so plainly radiant with Messianic promise, so menacing with storm-clouds of vengeance upon sin. The sign was refused moreover to an evil and adulterous generation, as God, in the Old Testament, would not be inquired of at all by such a people as this. This indignant rejoinder St. Mark has compressed into the words, “There shall no sign be given unto this generation”—this which has proof enough, and which deserves none. Men there were to whom a sign from heaven was not refused. At His baptism, on the Mount of Transfiguration, and when the Voice answered His appeal, “Father, glorify Thy name,” while the multitude said only that it thundered—at these times His chosen ones received a sign from heaven. But from those who had not was taken away even that which they seemed to have; and the sign of Jonah availed them not.