The Pharisees also with the Sadducees came, and tempting desired him that he would shew them a sign from heaven. He answered and said unto them, When it is evening, ye say, It will be fair weather: for the sky is red. And in the morning, It will be foul weather to day: for the sky is red and lowering. O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times? A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.

Matthew 16:1-4

Earth wise but heavenly foolish. Natural wise but spiritually bankrupt. These religious and political leaders were demanding a sign from heaven, in their blindness they could not discern heaven’s greatest sign before their very eyes. Noah was a sign to his time; Lot was a sign to the people of Sodom and Gomorrah. When Noah got into the ark, God shut the door, judgment began. When Lot got out of Sodom, it rained sulfur and brimstones from heaven. Discern the times.