Job 2:4

And Satan answered the Lord, and said, Skin for skin . No doubt a proverbial expression, resembling "Eye for eye, tooth for tooth; Tit for tat," and the like; but not expressive of retaliation. Satan means that, to keep his own "skin" intact, a man will sacrifice another's "skin;" even that of his nearest and dearest. Job, he insinuates, submitted to the loss of his children without a murmur, because he feared that otherwise God would stretch forth his hand against his person, and smite it or destroy it. He cannot imagine any motive for submission and apparent resignation but a selfish one (comp. Job 1:9 ). Yea, all that a man hath will he give for his life ; i.e. "a man will submit to the loss, not only of all his possessions, but even of those whom he loves best, to save his own life—he will do anything for that." So the "false accuser." All the numerous acts of self-sacrifice which human history presents, and has presented from the first, are ignored.