Job 8:10

words out of their heart Words not the result of hasty and superficial generalizing, but of an experience which the lengthened lives of these men had enabled them to pass through, and the principles learned in which had sunk into their heart. The "heart" is in Heb. the deepest part of human nature, whether intellect or feeling. There is an implied condemnation in all this of the new principles which Job was setting forth, what a subsequent speaker calls his "doctrine," ch. Job 11:4, principles based on nothing but his own single experience and instance.