Job 2:4

“And Satan answered the Lord, and said, etc.] Satan would not as yet own that Job was the man the Lord had described; but still would suggest, that he was a selfish and mercenary man, and that what had been done to him was not a sufficient trial of his integrity; the thing had not been pushed far and close enough to discover him; he had lost indeed his substance, and most of his servants, and all his children, but still he had not only his own life, but his health and ease; and so long as he enjoyed these he would serve God, though only for the sake of them: and therefore, says he, as it is usually and proverbially said, skin for skin, yea, all that a man hath will he give for his life; the…”

“Skin for skin--a proverb. Supply, "He will give." The "skin" is figurative for any outward good. Nothing outward is so dear that a man will not exchange it for some other outward good; "but" (not "yea") "life," the inward good, cannot be replaced; a man will sacrifice everything else for its sake. Satan sneers bitterly at man's egotism and says that Job bears the loss of property and children because these are mere outward and exchangeable goods, but he will give up all things, even his religion, in order to save his life, if you touch his bones and flesh. "Skin" and "life" are in antithesis [UMBREIT]. The martyrs prove Satan's sneer false. ROSENMULLER explains it not so well. A man…”

“Skin for skin - This is a proverbial expression, whose origin is unknown, nor is its meaning as “a proverb” entirely clear. The general sense of the passage here is plain, for it is immediately explained that a man would give everything which he had to save his life; and the idea here is, that if Job was so afflicted in his body that he was likely to die, he would give up all his religion in order to purchase life. His religion, which had berne the comparatively trifling test before applied to it, would not bear the severer trial if his life was endangered. In regard to the proverb itself, a great variety of explanations has been given. The ancient versions throw no light on it. The Vulgate…”

“Skin, &c. - The sense is, this is so far from being an evidence of Job's sincere and generous piety, that it is only an act of mere self - love; he is contented with the loss of his estate, and children too, so long as he sleeps in a whole skin; and he is well pleased, that thou wilt accept of these a ransom in his stead; and it is not true patience which makes him seem to bear his crosses so submissively, but policy, that he may appease thy wrath against him, and prevent those farther plagues, which, for his hypocrisy, he fears thou wilt otherwise bring upon his own carcase. Job 2:6”

“all that: Est 7:3, Est 7:4; Isa 2:20, Isa 2:21; Jer 41:8; Mat 6:25, Mat 16:26; Act 27:18, Act 27:19; Phi 3:8-10 Job 2:5”

“4, 5 And Satan answered Jehovah, and said, Skin for skin, and all that man hath will he give for his life: stretch forth yet once Thy hand, and touch his bone, and his flesh, truly he will renounce Thee to Thy face. Olshausen refers עזר בּעד עזר to Job in relation to Jehovah: So long as Thou leavest his skin untouched, he will also leave Thee untouched; which, though it is the devil who speaks, were nevertheless too unbecomingly expressed. Hupfeld understands by the skin, that skin which is here given for the other, - the skin of his cattle, of his servants and children, which Job had gladly given up, that for such a price he might get off with his own skin sound; but בּעד cannot be used as…”