10:12-14), Elijah calling down fire from heaven (2 Kings 1:10, 12), and Isaiah turning back the sun's shadow (Isaiah 38:8)—the challengers of Jesus, as noted by Blessed Theophylact, presumed He was incapable of performing heavenly signs, believing Him to only produce earthly signs through the power of Beelzebub. In their moral blindness, they either disregarded or misinterpreted the manifestations of divine power that Jesus pointed to as clear evidence of His role as the Messiah (John 5:36). Not acquiescing to the deceitful demand of the Pharisees and Sadducees, He remarked that if they had given as much attention to the remarkable events occurring around Him and through Him as they did to the ordinary phenomena of nature, they would not require any signs, whether celestial or terrestrial. The times of Salvation also come with their signs and implications, much like the well-understood shifts in weather. There is indeed a designated time for a heavenly sign—the second coming, when celestial powers will be shaken, and the moon will lose its light; however, such a sign did not accompany the first coming. In the evening you say, "It will be fair weather, for the sky is red," and in the morning, "It will be foul weather today, for the sky is red and threatening." You hypocrites, you can interpret the appearance of the sky, but you cannot discern the signs of the times. Grieving for the hypocrisy and stubbornness of His interrogators, He deeply sighed and reiterated: "Why does this wicked and adulterous generation seek a sign? Truly, I say to you, no sign shall be given to it except the sign of the prophet Jonah." This sign—referring to His death and resurrection—will stand as the most compelling proof of His divinity.