Let him not trust in emptiness, deceiving himself, for emptiness will be his payment.
Eliphaz, having reproved Job for his answers, here comes to maintain his own thesis, upon which he built his censure of Job. His opinion is that those who are wicked are certainly miserable, whence he would infer that those who are miserable are certainly wicked, and that therefore Job was so. Observe, I.
Commenting on Job 15:17-35
It shall be accomplished before his time, Either the recompence or reward of his trusting vanity, in vain persons or things, the punishment of such a trust, the sorrows and troubles following upon it; these shall come upon the wicked man "before his day" (f), as it may be rendered; before the day of his death, even before his old age; before the evil days...
Rather, "let him not trust in vanity or he will be deceived," &c. vanity--that which is unsubstantial. Sin is its own punishment (Pro 1:31; Jer 2:19).