John Wesley on Leviticus 21:17

Of thy seed - Whether the high priest, or the inferior ones. That hath - In all successive ages, any defect or excess of parts, any notorious deformity or imperfection in his body. The reason hereof is partly typical, that he, might more fully represent Christ, the great high - priest, who was typified both by the priest and sacrifice, and therefore both were to be without blemish; partly moral, to teach all Christians and especially ministers of holy things, what purity and perfection of heart and life they should labour after, and that notorious blemishes in the mind or conversation, render a man unfit for the ministry of the gospel; and partly prudential, because such blemishes were apt to breed contempt of the person; and consequently, of his function, and of the holy things wherein he ministered. For which reason, such persons as have notorious defects or deformities, are still unfit for the ministry except where there are eminent gifts and graces, which vindicate a man from the contemptibleness of his bodily presence. The particular defect's here mentioned, I shall not enlarge upon because some of the Hebrew words are diversely interpreted, and because the use of these things being abolished, the knowledge of them is not necessary.