The psalmist proclaims: “Behold, how good and how pleasant it is for brethren to dwell together in unity!” Unlike the unity of unbelievers and the heathen, the Lord rejoices in the righteous unity of His people. King David was someone who knew and experienced the difficulties of division. He spent a great deal of his life running from a king and those who were against him. Even in the beginning of his reign, the people were divided (2 Samuel 2:8-11). It was not until 7 1/2 years later that the people were united in David (2 Samuel 5:1-5). When the people dwelt in unity, David rejoiced. He likened it to the source of spiritual life for the nation of Israel, the priesthood (Psalm 133:2), and to the source of physical life in the dew of Hermon (Psalm 133:3). In other words, the right kind of unity gave life and hope to the nation!
Psalm 51 describes some of the dire consequences resulting from David’s sin with Bathsheba (see 2 Samuel chapters 11-12). Our passage commences with David’s testifying about his desire to be washed (Psalm 51:7). The next verse speaks of his desire to hear joy and gladness. David then goes on to express his desire for a clean heart and a right spirit. David was experiencing the debilitating results of his sin. Sin diminishes the spiritual blessings that God intends. In addition to these lost blessings, David also lost his joy. Joy is offered to the people of God, but never unconditionally. The conditions necessary for fulness of joy were discussed in the previous lesson, but it should be noted that the opposite actions yield contrary outcomes.
