Job 33:13

For] i.e. 'because.' Why does Job complain because God does not explain His treatment of him? God does answer man, as he proceeds to point out in two ways.

14-30. Elihu especially insists that the purposes of God's visitations are often to teach and to discipline; Job 15-18 represent one method of God's training, Job 33:19 another. 'In the first Elihu probably had Eliphaz in his eyes, in the second it is all but certain he had Job' (Cox).