John Calvin's Bible Commentary
Isaiah 37:11
11.Behold, thou hast heard. Here we ought to observe a twofold comparison; for he compares Hezekiah to other kings of Judah who preceded him, because he was inferior to them, and yet they were vanquished by the kings of Assyria; and Sennacherib, on the other hand, having obtained greater power than all the rest, is more daring and insolent. It followed, that Hezekiah could not resist him. The other comparison is that of the kings of Assyria, and Sennacherib himself, with the idols of the nations; for if the idols could not protect the nations that adored them, consequently neither will the God of Israel defend the nation by which he is adored.
When we thus read that singular assaults of temptations were directed against the faith of Hezekiah, let us prepare ourselves for the contest by being equipped with the same armor. Even while leisure is granted to us, let us endeavour to fortify ourselves early, in order that, when we come into such a field of battle, we may fight courageously. And if Satan taunt us with the destruction of many nations, we must attend to the difference of our condition; because, although we are liable to similar calamities, still we have assured hope of our salvation, of which they are destitute.