Shall not they teach thee - The results of human conduct, and the great principles on which God governs the world.
And utter words out of their heart - Dr. Good renders this,
“And well forth the sayings of their wisdom,”
And supposes it means that the words of wisdom would proceed from them as water bubbles from a fountain. But this, I think, is a mere conceit. The true sense is, that they would not speak that merely which comes from the mouth, or that which comes upper most, and without reflection - as the Greeks say, λέγειν πᾶν ὅ τι ἐπὶ στόμα ἔλθῃ legein pan ho ti epi stoma elthē; or, as the Latins, Quicquid in buccam venerit loqui - to speak whatever comes in the mouth; but they would utter that which came from the heart - which was sincere, and the result of deep and prolonged reflection. Perhaps, also, Bildad means to insinuate that Job had uttered what was uppermost in his mind, without taking time for reflection.