Ye that love the Lord, hate evil. The psalmist ends his strain with an exhortation to the faithful—an exhortation, first of all, to "hate evil." God hates evil (Psalms 45:7); evil will separate them from God, evil will be their destruction.
Therefore let them hate and abhor it. It is indifference to evil, that, more than anything else, lays men open to the assaults of Satan. He preserveth the souls of his saints. He (i.e. Jehovah) watches tenderly over the souls of his saints—his holy loving ones, and preserves them in being, keeps them from destruction, and delivereth them out of the hand of the wicked.