16:1-5 Eliphaz had represented Job's discourses as unprofitable, and nothing to the purpose; Job here gives his the same character. Those who pass censures, must expect to have them retorted; it is easy, it is endless, but what good does it do? Angry answers stir up men's passions, but never convince their judgments, nor set truth in a clear light. What Job says of his friends is true of all creatures, in comparison with God; one time or other we shall be made to see and own that miserable comforters are they all. When under convictions of sin, terrors of conscience, or the arrests of death, only the blessed Spirit can comfort effectually; all others, without him, do it miserably, and to no purpose. Whatever our brethren's sorrows are, we ought by sympathy to make them our own; they may soon be so.
4. heap up—rather, "marshal together (an army of) words against you."
shake … head—in mockery; it means nodding, rather than shaking; nodding is not with us, as in the East, a gesture of scorn (Isa 37:22; Jer 18:16; Mt 27:39).