| Geneva Study Bible Why doth a living {t} man complain, a man for the punishment of his sins? (t) When God afflicts him. Wesley's Notes 3:39 Wherefore - The Jews, check themselves in their complaints from the consideration, that nothing had befallen them, but what was the just reward of their sins. King James Translators' Notes complain: or, murmur Jamieson-Fausset-Brown Bible Commentary 39. living-and so having a time yet given him by God for repentance. If sin were punished as it deserves, life itself would be forfeited by the sinner. "Complaining" (murmuring) ill becomes him who enjoys such a favor as life (Pr 19:3). for the punishment of his sins-Instead of blaming God for his sufferings, he ought to recognize in them God's righteousness and the just rewards of his own sin. Nun. Matthew Henry's Concise Commentary 3:37-41 While there is life there is hope; and instead of complaining that things are bad, we should encourage ourselves with the hope they will be better. We are sinful men, and what we complain of, is far less than our sins deserve. We should complain to God, and not of him. We are apt, in times of calamity, to reflect on other people's ways, and blame them; but our duty is to search and try our own ways, that we may turn from evil to God. Our hearts must go with our prayers. If inward impressions do not answer to outward expressions, we mock God, and deceive ourselves. | 
