Jamieson, Fausset and Brown on Job 18:4

4. Rather, turning to Job, "thou that tearest thyself in anger" (Job 5:2).

be forsaken?--become desolate. He alludes here to Job's words as to the "rock," crumbling away (Job 14:18, 19); but in a different application. He says bitterly "for thee." Wert thou not punished as thou art, and as thou art unwilling to bear, the eternal order of the universe would be disturbed and the earth become desolate through unavenged wickedness [Umbreit]. Bildad takes it for granted Job is a great sinner (Job 8:3-6; Is 24:5, 6). "Shall that which stands fast as a rock be removed for your special accommodation?"