The Lord revealed to Hezekiah through Isaiah that Babylon would conquer Judah and Jerusalem, although not during the days of Hezekiah.
“So Hezekiah said to Isaiah, ‘The word of the LORD which you have spoken is good!’ For he said, ‘At least there will be peace and truth in my days’” (Isaiah 39:8).
Perhaps Hezekiah knew how Judah had been before, and what many of the people were still like, and so he knew this was inevitable, and that is why he was satisfied that he would not see the destruction.
He valued peace and truth. We wish everyone did. What would this world be like then? What do you do to pursue peace and truth?