10. teach thee—Job 6:24 had said, "Teach me." Bildad, therefore, says, "Since you want teaching, inquire of the fathers. They will teach thee."
utter words—more than mere speaking; "put forth well-considered words."
out of their heart—from observation and reflection; not merely, from their mouth: such, as Bildad insinuates, were Job's words. Job 8:11-13 embody in poetic and sententious form (probably the fragment of an old poem) the observation of the elders. The double point of comparison between the ungodly and the paper-reed is: 1. the luxuriant prosperity at first; and, 2. the sudden destruction.