I said, In the middle of my days I must depart; I am consigned to the gates of Sheol for the rest of my years.
10. I said in the cutting off of my days. This is a very melancholy song; for it contains complaints rather than prayers. Hence it is evident that he was oppressed by so great perplexity, that he was weary with groaning, and sunk in lamentations, and did not venture to rise up freely to form a prayer. Murmuring thus within himself, he expresses the cause and intensity of his grief.
We have here Hezekiah's thanksgiving-song, which he penned, by divine direction, after his recovery. He might have taken some of the psalms of his father David, and made use of them for his purpose; he might have found many very pertinent ones. He appointed the Levites to praise the Lord with the words of David, Ch2 29:30.
Commenting on Isaiah 38:9-22
I said, I shall not see the Lord, even the Lord in the land of the living,.... Not any more, in this world, though in the other, and that more clearly, even face to face: his meaning is, that he should no more see him in the glass of the word; no more praise him in his house; worship him in his temple; enjoy him...