The two soliloquies of Job (chs. 3 and 29-31) enclose three cycles of dialogue between Job and his three friends. Each cycle consists of speeches by Eliphaz, Bildad, and Zophar in that order interspersed with Job's reply to each address. This pattern continues through the first two cycles of speeches (chs. 4-14 and 15-21) but breaks down in the third when Zophar failed to continue the dialogue.
"There are two basic lines of interaction which run through Job--Job's crying out to God and Job's disputations with his three friends. The absence of the third speech of Zophar is consistent with the fact that each of the speeches of the three friends is progressively shorter in each cycle and that Job's responses to each of the friends (which also are progressively shorter) are longer than the corresponding speech of the friends. This seems to signify Job's verbal victory over Zophar and the other two friends. It is also indicative of the bankruptcy and futility of dialogue when both Job and the three friends assume the retribution dogma (which for the friends implies Job's guilt and for Job implies God's injustice). Consequently, this structural design marks a very gradual swing toward a focus on Job's relationship and interaction with God in contrast to the earlier primary interaction between Job and his friends."34
Throughout the three cycles of speeches Job's friends did not change their position. They believed that God rewards the righteous and punishes sinners, the theory of retribution.35They reasoned that all suffering is punishment for sin, and since Job was suffering, he was a sinner. They believed that what people experience depends on what they have done (cf. John 9:2). While this is true often, it is not the fundamental reason we experience what we do in life, as the Book of Job proceeds to reveal.
As the speeches unfolded, Job's friends became increasingly vitriolic and specific about Job's guilt. This was true of Eliphaz (cf. 5:8; ch. 15; 22:5-9), Bildad (cf. 8:6; ch. 18; 25:5-6), and Zophar (cf. 11:14; ch. 20).
In each of his speeches Job affirmed his innocence of great sin (6:10; 9:21; 16:17; 27:6). In his first five responses he charged God with afflicting him (6:4; 9:17; 13:27; 16:12; 19:11). In each of his first three replies in the first cycle he asked, "Why?"(7:20; 10:2; 13:24). In all six of his speeches he longed to present his case to God (9:3; 13:3; 16:21; 19:23; 23:4; 31:35).
Job's friends each emphasized a different aspect of God's character. Eliphaz pointed out the distance between God and man (4:17-19; 15:14-16) and stressed God's punishment of the wicked (5:12-14). Bildad said God is just (8:3), great (25:2-3), and that He punishes only the wicked (18:5-21). God's inscrutability impressed Zophar (11:7) who also stated that God punishes the wicked quickly (20:23).
Eliphaz spoke to Job with the most respect and restraint, Bildad was more direct and less courteous, and Zophar was the most blunt and harsh. Eliphaz based his arguments on experience (4:8; 5:3; 15:17), Bildad on tradition (8:8-10), and Zophar on mere assumption (20:1-5). Eliphaz viewed life as a mystic, Bildad as an attorney, and Zophar as a dogmatist. Bildad and Zophar picked up themes from Eliphaz's speeches and echoed them with slightly variant emphases (cf. 5:9 and 22:12 with 8:3, 5; 22:2a with 11:7, 11; 15:32-34 with 18:16 and 20:21-22; and 5:14 with 18:5, 6, 18 and 20:26).