"He trusted in the LORD, the God of Israel, so that there was none like him among all the kings of Judah after him” (18:5). In an era of terrible kings (north and south), King Hezekiah was radically different. Northern Israel had rebelled for so long that God allowed the Assyrian empire to invade and overthrow them (ch 17). When Assyria’s general then threatened Judah, mocking them as small and powerless (18:19), King Hezekiah was terrified but stood firm (19:1,16).
Tiny Judah was no match for the Assyrian empire, but Hezekiah depended on God’s help. Our troubles may be real and frightening, but God is infinitely powerful and good, and He is on our side (Rom 8:31).