Isaiah 37-39…Hezekiah’s prayer.
Hezekiah’s intercession (Isaiah 38) shows the power of prayer before our sovereign Creator, which is also confirmed in today’s passage. This record of Hezekiah’s illness and recovery, Isaiah 38:6 reveals, took place before the events recorded in chapter 37. (Biblical authors sometimes do not order their accounts chronologically.) Therefore, the promise Isaiah gave in 37:5–7 was not the Lord’s first pledge to deliver Jerusalem from Assyria. In His grace, God repeats His promises to us, increasing our confidence in His Word.
Unlike his father, Ahaz, who lacked faith to ask for a sign from God, we know that Hezekiah asked for a sign of his recovery and Jerusalem’s rescue (2 Kings 20:8). God granted this sign, healing Hezekiah and adding fifteen years to his life (Isa. 38:4–6).
God’s granting fifteen more years of life to Hezekiah does not mean He changes His mind like we do. Instead, such accounts show us that the Lord has a real relationship with His people in time and responds to our prayers and actions. Hezekiah did not know how God would answer His prayer for healing, but the Lord did. Similarly, God knows how He will answer our prayers even before we offer them, but that must not keep us from interceding for ourselves and others.