John Lightfoot on Matthew 16:3

[Can ye not discern the signs of the times?] The Jews were very curious in observing the seasons of the heavens, and the temper of the air.

"In the going out of the last day of the feast of Tabernacles, all observed the rising of the smoke. If the smoke bended northward, the poor rejoiced, but the rich were troubled; because there would be much rain the following year, and the fruits would be corrupted: if it bended southward, the poor grieved, and the rich rejoiced; for then there would be fewer rains that year, and the fruit would be sound: if eastward, all rejoiced: if westward, all were troubled." The Gloss is, "They observed this the last day of the feast of Tabernacles, because the day before, the decree of their judgment concerning the rains of that year was signed, as the tradition is, In the feast of Tabernacles they judged concerning the rains."

"R. Acha said, If any wise man had been at Zippor when the first rain fell, he might foretell the moistness of the year by the very smell of the dust," &c.

But they were dim-sighted at the signs of times; that is, at those eminent signs, which plainly pointed, as with the finger and by a visible mark, that now those times that were so much foretold and expected, even the days of the Messias, were at hand. As if he had said, "Can ye not distinguish that the times of the Messias are come, by those signs which plainly declare it? Do ye not observe Daniel's weeks now expiring? Are ye not under a yoke, the shaking off of which ye have neither any hope at all nor expectation to do? Do ye not see how the nation is sunk into all manner of wickedness? Are not miracles done by me, such as were neither seen nor heard before? Do ye not consider an infinite multitude flowing in, even to a miracle, to the profession of the gospel? and that the minds of all men are raised into a present expectation of the Messias? Strange blindness, voluntary, and yet sent upon you from heaven: your sin and your punishment too! They see all things which may demonstrate and declare a Messias, but they will not see."