What does the Bible say about Hezekiah's prayer of thanksgiving?

In Isaiah 38, we see Hezekiah praying after recovering from a dire illness. His prayer culminates in a profound expression of gratitude to God for delivering him from death. Specifically, he acknowledges how by God's mercies, men live, saying, 'O Lord, by these things men live, and in all these things is the life of my spirit' (Isaiah 38:16). This underscores the theological importance of prayer in invoking God's healing and the acknowledgment that our lives are sustained by God's grace.