"May the good LORD pardon everyone who sets his heart to seek God, the LORD, the God of his fathers, even though not according to the sanctuary's rules of cleanness" (v18-19). King Hezekiah’s spiritual reforms took some people by surprise; even many leaders (priests and Levites) had become accustomed to neglecting worship and so had not ritually prepared themselves (v15). They were “ashamed,” yet they seized the opportunity to get right with God, and King Hezekiah encouraged them (v22).
“And the Lord heard Hezekiah and healed the people” (v20). God doesn’t wait until we are prepared and have our lives in order. He eagerly accepts our sincere repentance and welcomes us home.