How then can man be justified with God? - see Job 4:17-18; Job 15:15-16. Instead of meeting the facts to which Job had appealed, all that Bildad could now do was to repeat what had been said before. It shows that he felt himself unable to dispose of the argument, and yet that he was not willing to confess that he was vanquished.
Or how can he be clean? - This sentiment had been expressed by Job himself, Job 14:4. Perhaps Bildad meant now to adopt it as undoubted truth, and to throw it back upon Job as worthy of his special attention. It has no bearing on the arguments which Job had advanced, and is utterly irrelevant except as Bildad supposed that the course of argument maintained by Job implied that he supposed himself to be pure.

How then can man be justified? - Or, ונה umah, With what, shall a man be justified with God? Though this is no conclusion from Bildad's premises, yet the question is of the highest importance to man. Neither Bildad nor any of his fellows could answer it; the doctrine of redemption through the blood of the cross was then known only through types and shadows. We who live in the Gospel dispensation, can readily answer the question, With what shall miserable man (אנוש enosh) be justified with God? - Ans. By bringing forward, by faith, to the throne of the Divine justice, the sacrificial offering of the Lord Jesus Christ; and confiding absolutely in it, as being a full, sufficient, and complete atonement and sacrifice for his sins, and for the salvation of a lost world. How, or with what (ומה umah) shall he be clean that is born of a woman? - Ans. By receiving that grace or heavenly influence communicated by the power and energy of the eternal Spirit applying to the heart the efficacy of that blood which cleanses from all unrighteousness. This, and this only, is the way in which a sinner, when truly penitent, can be justified before God: and in which a believer, convinced of indwelling sin, can be sanctified and cleansed from all unrighteousness. This is the only means of justification and sanctification, without which there can be no glorification. And these two great works, which constitute the whole of salvation, have been procured for a lost world by the incarnation, passion, death, and resurrection of the Lord Jesus Christ, who was delivered for our offenses, and rose again for our justification; to whom be glory and dominion now and for evermore, Amen!

How then can man (c) be justified with God? or how can he be clean [that is] born of a woman?
(c) That is, be just in respect to God?

How then can man be justified with God? Since he sees all his ways and works, his secret as well as open sins; either be more just than he, as Eliphaz expresses it, Job 4:17; which no man in his senses will say; or just as he is, and upon a level with him, or in comparison of him, or before him, and in his sight: and this is what Job himself denies, Job 9:2; for however righteous a man may be in his own sight, or in the sight of others, he cannot of himself be justified in the sight of God; nor can any be justified with him by his own righteousness, because the best righteousness of man is imperfect; and, if Bildad thought this was the sentiment of Job, he mistook him; for, what he meant by coming to the seat of God, and ordering his cause before him, Job 23:2; to which Bildad seems to refer, and being judged by him, when he doubted not but he should be acquitted, was no other than the justification of his cause, and not of his person before God; or that he should be cleared of the imputation of hypocrisy, and of being the sinner and wicked man, and guilty of very bad things, though secret and private, for which he was afflicted; for otherwise Job knew full well that he could not be justified with God by his own personal righteousness, for he knew himself to be a sinner, and owns it; nor did he think himself perfect, and his righteousness a complete one; and therefore he expected not to be justified by it; he knew his living Redeemer, and believed in him for righteousness, and expected the justification of his person, and his acceptance with God, only by him; and in this way there are many that are justified with God secretly, "in foro Dei", in the court of God, and in his sight, who always beholds his people as righteous in Christ, and openly, "in foro conscientiae", in the court of conscience, when they believe in him; and who will be publicly justified, and declared righteous, at the day of judgment:
or how can he be clean that is born of a woman? which suggests a doctrine that Job as firmly believed as Bildad did, that all men are unclean by natural generation, or as they are born into the world; their ancestors being such, the more immediate, and the more remote, which may be traced back to the first man and woman, Job 14:4; so that as no man is clean and pure as God is, or in comparison of him, or in his sight; they can neither be naturally clean, nor so of themselves, by any means or methods they can make use of; but then they may be, as many are, clean by the blood of Christ, and grace of God, through which his people are cleansed from all their sins, and all their iniquities, and are without spot before the throne and in the sight of God.

(Job 4:17-18; Job 14:4; Job 15:14).

Man - The word signifies man that is miserable, which supposes him to be sinful; and shall such a creature quarrel with that dominion of God, to which the sinless, and happy, and glorious angels submit? God - Before God's tribunal, to which thou dost so boldly appeal.