What is God like? This is where the Blessed Trinity comes in. We believe that God is communion rather than solitude. It is not a "one" that is primary but the "three." The three comes first. Then, because of the intimate relationship between the "three" comes the "one" as expressing the unity of the three.
Believing in the Trinity means that at the root of everything that exists and subsists there is movement; there is an eternal process of life, of outward movement, of love.
Believing in the Trinity means that truth is on the side of communion rather than exclusion; consensus translates truth better than imposition; the participation of many is better than the dictate of a single one.
Believing in the Trinity means accepting that everything is related to everything and so makes up one great whole, and that unity comes from a thousand convergences rather than from one factor alone.
We never simply live, we always live together. Whatever favors shared life is good and worthwhile. Hence, it is worthwhile believing in this community-style of God's existence, of God's Trinitarian manner that is always communion and union of three.
– Leonardo Boff