8:11-21 Obstinate unbelief will have something to say, though ever so unreasonable. Christ refused to answer their demand. If they will not be convinced, they shall not. Alas! what cause we have to lament for those around us, who destroy themselves and others by their perverse and obstinate unbelief, and enmity to the gospel! When we forget the works of God, and distrust him, we should chide ourselves severely, as Christ here reproves his disciples. How is it that we so often mistake his meaning, disregard his warnings, and distrust his providence?
11. seeking of him a sign from heaven, tempting him—not in the least desiring evidence for their conviction, but hoping to entrap Him. The first part of the answer is given in Matthew alone (Mt 16:2, 3): "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 [sullen, gloomy]. Hypocrites! ye can discern the face of the sky; but can ye not discern the signs of the times?" The same simplicity of purpose and careful observation of the symptoms of approaching events which they showed in common things would enable them to "discern the signs of the times"—or rather "seasons," to which the prophets pointed for the manifestation of the Messiah. The scepter had departed from Judah; Daniel's seventy weeks were expiring, &c.; and many other significant indications of the close of the old economy, and preparations for a freer and more comprehensive one, might have been discerned. But all was lost upon them.