Job 4:3 - Ellicott's Commentary On The Whole Bible

Behold, thou hast instructed many. — There is a conspicuous want of feeling in Eliphaz. Without any true sympathy, however, he may have given the outward signs of it (Job 2:12-13). He charges Job with inability to derive from his own principles that support which he had expected them to afford to others, and seems almost to rejoice malevolently that one who had been so great a help to others was now in need of help himself. “Calamity touches thee, and thou art overwhelmed by it.”