The need for a theology about the Day of Pentecost is seen by reflecting on how readily Christians misunderstand the nature of the church. For many people the church is a voluntary organization of individuals. . . .
The church is a community called together by the Spirit of the Risen One. It is not something we choose to do (and equally well could choose not to do), but something to which we are summoned. The Greek word for church (ekklēsia from which we derive “ecclesiastical”) means “those who have been called forth or summoned,” much as one is summoned to appear in a court of law. And we are called as a body of interdependent parts, not as separable individuals. The free-spirited individualism of our age is a manifestation of Babel, not Pentecost, as should be evident from the intransigent divisions and intractable conflicts such individualism fosters. The Risen One, who is present at all times and in all places, seeks to bind together by the action of the Spirit all things that have been wrongly separated. Participation therefore is not something we do on the basis of personal choice or need; participation in the Body of Christ is inherent in being Christian. The church, not the individual, is the irreducible unit of Christianity. Further, the church is to be a sign of the future: No matter how haltingly and imperfectly, the church seeks to enact in the present world the justice and grace that characterize the eternal reign of God. Therefore Christians participate in the church not so much for what they can get as for what they can give, for what they can offer as an alternative to the dominant ways of the world.
—Laurence Hill Stookey, Calendar: Christ’s Time for the Church, 76-77