Psalms 133:1 - Joseph Benson’s Commentary on the Old and New Testaments

Behold, how good and how pleasant, &c. It is good in itself, agreeable to the will of God, and therefore peculiarly pleasing to him, as it is also to all good men: it is good for us, for our honour and comfort. It is pleasant, and brings constant delight to those who experience and practise it. For brethren to dwell together in unity For us, who are brethren, not only by nature and blood, but also by combination in one and the same commonwealth, and by the profession of the same religion. “Many things are good which are not pleasant, and many pleasant which are not good. But unity among brethren, whether civil or religious, is productive both of profit and pleasure. Of profit, because therein consisteth the welfare and security of every society; of pleasure, because mutual love is the source of delight, and the happiness of one becomes, in that case, the happiness of all. It is unity alone which gives beauty, as well as strength, to the state; which renders the church, at the same time, fair as the moon, and terrible as an army with banners, Song of Solomon 6:10.” Horne.