Matthew 3:4

For the preaching of John no place more suitable, no clothing more useful, no food more fitted. The preacher of Christ is clad in the skins of unclean beasts, to which the Gentiles are compared, and so by the Prophets' dress is sanctified whatever in them was useless or unclean. The girdle is a thing of much efficacy to every good work, that we may be girt for every ministry of Christ. For his food are chosen locusts, which fly the face of man, and escape from every approach, signifying ourselves who were borne away from every word or speech of good by a spontaneous motion of the body, weak in will, barren in works, fretful in speech, foreign in abode, are now become the food of the Saints, chosen to fill the Prophets' desire, furnishing our most sweet food not from the hives of the law, but from the trunks of wild trees.

"And the same John had his raiment of camel's hair, and a leathern girdle about his loins." Observe, how the prophets foretold some things, others they left to the evangelists. Wherefore also Matthew both sets down the guided by what they then beheld, to the memory of that blessed man; or rather, even to a greater astonishment. For the one indeed was brought up in cities and in houses, the other dwelt entirely in the wilderness from his very swaddling clothes. For it be away all the ancient ills, the labor, for example, the curse, the sorrow, the sweat; himself also to have certain tokens of such a gift, and to come at once to be above that condemnation. Thus he neither ploughed land, nor opened furrow, he ate not his bread by the sweat of his face, but his table was hastily supplied, and his clothing more easily furnished than his table, and his lodging yet less troublesome than his clothing. For he needed neither roof, nor bed, nor table, nor any other of these things, but a kind of angel's life in this our flesh did he exhibit. For this cause his very garment was of hair, that by his dress he might instruct men to separate themselves from all things human, and to have nothing in common with the earth, but to hasten back to their earlier nobleness, wherein Adam was before he wanted garments or robe. Thus that garb bore tokens of nothing less than a kingdom, and of repentance. And do not say to me, "Whence had he a garment of hair and a girdle, dwelling as he did in the wilderness?" For if thou art to make a difficulty of this, thou wilt also inquire into more things besides; how in the winters, and how in the heats of summer, he continued in the wilderness, and this with a delicate body, and at an immature age? how the nature of his infant flesh endured such great inconstancy of weather, and a diet so uncommon, and all the other hardships arising from the wilderness? Where now are the philosophers of the Greeks, who at random and for nought emulated the shamelessness of the Cynics (for what is the profit of being shut up in a tub, and afterwards running into such wantonness)? they who encompassed themselves with rings and cups, and men servants and maid servants, and with much pomp besides, falling into either extreme. But this man was not so; but he dwelt in the wilderness as in Heaven, showing forth all strictness of self-restraint. And from thence, like some angel from Heaven, he went down unto the cities, being a champion of godliness, and a crowned victor over the world, and a philosopher of that philosophy which is worthy of the heavens. And these things were, when sin was not yet put away, when the law had not yet ceased, when death was not yet bound, when the brazen gates were not yet broken up, but while the ancient polity still was in force. Such is the nature of a noble and thoroughly vigilant soul, for it is everywhere springing forward, and passing beyond the limits set to it; as Paul also did with respect to the new polity. But why, it may be asked, did he use a girdle with his raiment? This was customary with them of old time, before men passed into this soft and loose kind of dress. Thus, for instance, both Peter appears to have been "girded," and Paul; for it saith, "the man that owneth this girdle." And Elijah too was thus strayed, and every one of the saints, because they were at work continually, laboring, and busying themselves either in journeyings, or about some other necessary matter; and not for this cause only, but also with a view of trampling under foot all ornaments, and practising all austerity. This very kind of thing accordingly Christ declares to be the greatest praise of virtue, thus saying, "What went ye out for to see? a man clothed in soft raiment? behold, they that wear soft clothing are in king's houses." But if he, who was so pure, and more glorious than the heaven, and above all prophets, than whom none greater was born, and who had such great boldness of speech, thus exercised himsel

His raiment of camel's hair, not of wool—the one the mark of austerity in dress, the other of a delicate luxury. Food moreover suited to a dweller in the desert, no choice viands, but such as satisfied the necessities of the body. His girdle of skin, which Elias also bare, is the mark of mortification.

Having said that he is the voice of one crying in the desert, the Evangelist well adds, John had his clothing of camel's hair; thus showing what his life was; for he indeed testified of Christ, but his life testified of himself. No one is fit to be another's witness till he has first been his own. It becomes the servants of God to use a dress not for elegant appearance, or for cherishing of the body, but for a covering of the nakedness. Thus John wears a garment not soft and delicate, but hairy, heavy, rough, rather wounding the skin than cherishing it, that even the very clothing of his body told of the virtue of his mind. It was the custom of the Jews to wear girdles of wool; so he desiring something less indulgent wore one of skin.

In this clothing and this poor food, he shows that he sorrows for the sins of the whole human race. In John (which name is interpreted 'the grace of God,') is figured Christ who brought grace into the world; in his clothing, the Gentile Church.