job 4:21 Doth not their excellency which is in them go away? they die, even without wisdom. - Free Bible Online

      21. their excellency-- (Ps 39:11; 146:4; 1Co 13:8). But UMBREIT, by an Oriental image from a bow, useless because unstrung: "Their nerve, or string would be torn away." MICHAELIS, better in accordance with Job 4:19, makes the allusion be to the cords of a tabernacle taken down (Isa 33:20).
      they die, even without wisdom--rather, "They would perish, yet not according to wisdom," but according to arbitrary choice, if God were not infinitely wise and holy. The design of the spirit is to show that the continued existence of weak man proves the inconceivable wisdom and holiness of God, which alone save man from ruin [UMBREIT]. BENGEL shows from Scripture that God's holiness (Hebrew, kadosh) comprehends all His excellencies and attributes. DE WETTE loses the scope, in explaining it, of the shortness of man's life, contrasted with the angels "before they have attained to wisdom."

JFB.