William Burkitt on Matthew 27:37

It was the manner of the Romans, when they crucified any man, to publish the cause of his death in capital letters, placed over the head of the person. Now see how the wisdom and providence of God powerfully over-ruled the heart and pen of Pilate to draw his title, which was truly honourable; and fix it to his cross: Pilate is Christ's herald, and proclaims him, King of the Jews.

Learn hence, That the regal dignity of Christ was proclaimed by an enemy, and that in a time of his greatest sufferings and reproaches. Pilate did Christ a special honour, and an eminent piece of service. He did that for Christ which none of his own disciples durst do; but he did it not designedly for his glory, but from the special over-ruling power of divine Providence: but the highest services performed to Christ undesignedly, shall never be accepted or rewarded by God.