Up until this point Job has not been willing to admit that anything his friends have said was right. But here we notice a change.
V.1-13 The argument goes on and on, as to whether the wicked people live long. Job says that they have a happy life.
V.13 But he admits that suddenly they die. Do you think that the wicked get away with things in this life? Yes, they do.
V.14-15 This is what the wicked say in their heart.
V.16 But Job is quick to tell us that he is not like them!
V.17-34 Here is where Job admits a bit of the arguments of Zophar, that the wicked get cut off suddenly. But he says that God does this because He gets angry at them. We can notice slight changes in Job. He begins to allow that there was some truth in what they were saying, but not much.