Charles H. Spurgeon on Psalms 101:8

I will early destroy all the wicked of the land. At the very outset of his government he would promptly deal out justice to the worthless, he would leave them no rest, but make them leave their wickedness or feel the lash of the law. The righteous magistrate "beareth not the sword in vain." To favour sin is to discourage virtue; undue leniency to the bad is unkindness to the good. When our Lord comes in judgment, this verse will be fulfilled on a large scale; till then he sinks the judge in the Saviour, and bids men leave their sins and find pardon. Under the gospel we also are bidden to suffer long, and to be kind, even to the unthankful and the evil; but the office of the magistrate is of another kind, and he must have a sterner eye to justice than would be proper in private persons. Is he not to be a terror to evil doers? That I may cut off all the wicked doers from the city of the Lord. Jerusalem was to be a holy city, and the psalmist meant to be doubly careful in purging it from ungodly men. Judgment must begin at the house of God. Jesus reserves his scourge of small cords for sinners inside the temple. How pure ought the church to be, and how diligently should all those who hold office therein labour to keep out and chase out men of unclean lives. Honourable offices involve serious responsibilities; to trifle with them will bring our own souls into guilt, and injure beyond calculation the souls of others. Lord, come to us, that we, in our several positions in life, may walk before thee with perfect hearts.