and therefore Bildad would not have him take their sense of things, but inquire of persons older and wiser:because our days upon earth [are] a shadow; man's time is rather measured by days than by months and years, being so short; and these are called "days" on earth, to distinguish them from the days of heaven, which are one everlasting day, in which there is no night of darkness, either in a literal or figurative sense, and which will never end; but the days of this life are like a "shadow", dark and obscure; full of the darkness of adversity and trouble, as well as greatly deficient in the light of knowledge; there is nothing in them solid and substantial; the greatest and best things of this life are but a vain show; in heaven there is a better and more enduring substance: every thing is mutable and uncertain here; man is subject to a variety of changes in his mind and body, in family and outward estate and circumstances: and life itself is but a vapour, which appears a while and soon vanishes away; or rather like a shadow, that declines, is fleeting, and quickly gone; see 1Ch 29:15.
epameroi, Pindar.