Isaiah 38:3

And said, Remember now, O LORD, I beseech thee, how I have walked before thee in truth and with a perfect heart, and have done that which is good in thy sight. And Hezekiah wept sore.

Remember now, O Lord ... He mentions his past religious consistency not as a boast, or a ground for justification, but according to the Old Testament dispensation, wherein temporal rewards (as long life, etc., ) followed legal obedience, he makes his religious conduct a plea for asking the prolongation of his life.

Walked - life is a journey: the pious 'walk with God' (; ).

With a perfect heart - sincere. not absolutely perfect, but aiming toward it (): single-minded in walking as in the presence of God (), The letter of the Old Testament legal righteousness was, however, a standard very much below the spirit of the law as unfolded by Christ (Matthew 5:20; ; ; ).

And Hezekiah wept sore. Josephus says the reason why he wept so sorely was that, being childless, he was leaving the kingdom without a successor. How often our wishes, when gratified, prove curses! Hezekiah lived to have a son, late in life (for his son was only twelve years old at his accession, ), about three years after Hezekiah's sickness. That son was the idolater Manasseh, the chief cause of God's wrath against Judah, and of the overthrow of the kingdom ().