Basil of Caesarea

The superior should not administer a rebuke to wrongdoers when his own passions are aroused. By admonishing a brother with anger and indignation, he does not free him from his faults but involves himself in the error.… Nor should he become vehemently angry even when he himself is treated with contempt. When he sees such treatment inflicted upon another, he should again show himself indulgent toward the sinner; but more than that, he ought, in the latter case, to manifest displeasure at the wrong done.