20 Do you think that mere words are strategy and power for war? On whom do you now rely, that you have rebelled against me? 21 Behold, you are relying now on Egypt, that broken reed of a staff, which will pierce the hand of any man who leans on it. Such is Pharaoh king of Egypt to all who rely on him. 22 But if you say to me, "We rely on the Lord our God," is it not he whose high places and altars Hezeki'ah has removed, saying to Judah and to Jerusalem, "You shall worship before this altar in Jerusalem"? 23 Come now, make a wager with my master the king of Assyria: I will give you two thousand horses, if you are able on your part to set riders upon them. 24 How then can you repulse a single captain among the least of my master's servants, when you rely on Egypt for chariots and for horsemen?
Matthew Henry's Commentary on 2 Kings 18:20-24
Commentary on 2 Kings 18:17-37
(Read 2 Kings 18:17-37)
Rabshakeh tries to convince the Jews, that it was to no purpose for them to stand it out. What confidence is this wherein thou trustest? It were well if sinners would submit to the force of this argument, in seeking peace with God. It is, therefore, our wisdom to yield to him, because it is in vain to contend with him: what confidence is that which those trust in who stand out against him? A great deal of art there is in this speech of Rabshakeh; but a great deal of pride, malice, falsehood, and blasphemy. Hezekiah's nobles held their peace. There is a time to keep silence, as well as a time to speak; and there are those to whom to offer any thing religious or rational, is to cast pearls before swine. Their silence made Rabshakeh yet more proud and secure. It is often best to leave such persons to rail and blaspheme; a decided expression of abhorrence is the best testimony against them. The matter must be left to the Lord, who has all hearts in his hands, committing ourselves unto him in humble submission, believing hope, and fervent prayer.