Matthew Poole and continuators on Job 15:18

18. Which wise men have told from their fathers , and have not hid it :

Who are most able to be Witnesses and Judges in these matters.

Or Ancestors; who diligently observed this, and carefully transmitted their own judgment and experience successively, to their Posterity.

They judged it to be so certain and so important a truth that they would not conceal it in their own breasts, but made conscience of publishing it for the instruction and comfort of succeeding ages.