Mark 15:19

(ubi sup.) And that the soldiers worshipped Him as one who falsely called Himself God, is clear from what is added: And bowing their knees, worshipped him, as though He pretended to be God.

(ubi sup.) But they smite the head of Christ, who deny that He is very God. And because men are wont to use a reed to write with, they, as it were, smite the head of Christ with a reed, who speak against His divinity, and endeavour to confirm their error by the authority of Holy Writ. They spit in His face, who spit from them by their accursed words the presence of His grace. There are some also in this day, who adore Him, with a sure faith, as very God, but by their perverse actions, despise His words as though they were fabulous, and think the promises of that word inferior to worldly allurements. But just as Caiaphas said, though he knew not what it meant, It is expedient for us that one man should die for the people, (John 11:50) so also the soldiers do these things in ignorance.

The vainglory of soldiers, ever rejoicing in disorder and in insult, here displayed what properly belonged to them. Wherefore it is said, And the soldiers led him away into the hall called Praetorium, and they call together the whole band, that is, the whole company of the soldiers, and they clothed him with purple as a king. Let us also put on the purple and royal robe, because we must walk as kings treading on serpents and scorpions, and 1 having sin under our feet. For we are called Christians, that is, anointed ones, just as kings were then called anointed. Let us also take upon ourselves the crown of thorns, that is, let us make haste to be crowned with a strict life, with self-denials and purity.

His shame took away our shame; His bonds made us free; by the thorny crown of His head, we have obtained the crown of the kingdom; by His wounds we are healed. But in a mystic sense, Jesus was stripped of His clothes, that is, of the Jews, and is clothed in a purple robe, that is, in the Gentile church, which is gathered together out of the rocks. Again, putting it off in the end, as offending, He again is clothed with the Jewish people, for when the fulness of the Gentiles is come in, then shall all Israel be saved. (Rom. 11:25.)