The Trinity is a mystery which defies the understanding of finite man. Any explanation can be at best an attempt at clarification -- in terms of man. Father McDonough's effort is a valiant one but offers very little more than what has been said before -- in a different framework. His oversimplified philosophizing is often condescending and frequently becomes irritating. Homely examples occasionally help to make a point but most often ""limp"". To be sure, contemplation of the divine Family -- the Father, the Son and the Holy Spirit -- is always a fruitful spiritual exercise. This new book on the subject lends itself to recommendation for that purpose, of course. But the preachy approach of Father McDonough minimizes its effectiveness even for those who pick up The Divine Family with this good intention.