For we are but of yesterday and know nothing, for our days on earth are a shadow.
Bildad here discourses very well on the sad catastrophe of hypocrites and evil-doers and the fatal period of all their hopes and joys. He will not be so bold as to say with Eliphaz that none that were righteous were ever cut off thus (Job 4:7); yet he takes it for granted that God, in the course of his providence, does ordinarily bring wicked men...
Commenting on Job 8:8-19
Shall not they teach thee, and tell thee,.... That is, the men of the former age, and their fathers before them, Job is directed to inquire of, and to prepare for a search into their records and traditions; from whom he might reasonably expect to be taught and told things that would be very instructive and useful to him in his present circumstances: and utter words out of their heart?
of yesterday--that is, a recent race. We know nothing as compared with them because of the brevity of our lives; so even Jacob (Gen 47:9). Knowledge consisted then in the results of observation, embodied in poetical proverbs, and handed down by tradition. Longevity gave the opportunity of wider observation. a shadow-- (Psa 144:4; Ch1 29:15).