William Burkitt on Titus 2:15

As if he had said, Let these necessary practical truths be the subject-matter of thy preaching, and according to the authority of thy office rebuke gainsayers, and let thy doctrine and behaviour in wisdom and gravity be such, as may keep and preserve thee from all contempt. The ministers of Christ are to take special care that they neither expose their persons nor their office, by any indecencies, to contempt: Let no man despise thee.