Be strong, fear not:... — The words are, of course, wide and general enough, but looking to the probable date of this section, we may perhaps connect them with the tone of Hezekiah’s speech in 2 Chronicles 32:7. Both king and prophet had the same words of comfort for the feeble and faint-hearted, and the ground of comfort is that the government of God is essentially a righteous government, punishing the oppressor, and saving the oppressed. (Comp. Joshua 1:6-7.)
Related Commentaries of Isaiah 35:4
Isaiah 35:4
4 Say to them that are of a fearfula heart, Be strong, fear not: behold, your God will come with vengeance, even God with a recompence; he will come and save you.