Job blathers incongruously about mining for 11 verses before getting to his point: we know where to dig for shiny stones, but not for wisdom. Nor can it be purchased, for the price of wisdom is above rubies (v. 18). Chalk that up under 'sayings I didn't know were biblical.' Only god is wise.
Job waxes nostalgic for his old life, when he could go out at night in safety and his kids were around and he had plenty of cream and olive oil. Notice where in that list the kids are. He was a public figure and everybody loved him because he helped widows and orphans and did good deeds for the blind and the lame and gave hospitality to strangers, and, and, and. Does anybody get the feeling god might be punishing Job for his smugness?