The Church’s mission has its origins in the mystery of the triune God, in the mystery of his creative love. Love is not just somehow within God, he himself is love by nature. And divine love does not want to exist in isolation, it wants to pour itself out. It has come down to men in a particular way through the incarnation and self-offering of God’s Son. He stepped outside the framework of his divinity, he took flesh and became man; and indeed his purpose was not merely to confirm the world in its worldliness and to be its companion, leaving it completely unchanged. The Christ event includes the inconceivable fact of what the Church Fathers call a commercium, an exchange between God and man, in which the two parties – albeit in quite different ways – both give and take, bestow and receive. The Christian faith recognizes that God has given man a freedom in which he can truly be a partner to God, and can enter into exchange with him. At the same time it is clear to man that this exchange is only possible thanks to God’s magnanimity in accepting the beggar’s poverty as wealth, so as to make the divine gift acceptable, given that man has nothing of comparable worth to offer in return.
The Church likewise owes her whole being to this unequal exchange. She has nothing of her own to offer to him who founded her. She finds her meaning exclusively in being a tool of salvation, in filling the world with God’s word and in transforming the world by bringing it into loving unity with God. The Church is fully immersed in the Redeemer’s outreach to men. She herself is always on the move, she constantly has to place herself at the service of the mission that she has received from the Lord. The Church must always open up afresh to the cares of the world and give herself over to them, in order to make present and continue the holy exchange that began with the Incarnation.
To be a member of the Church is to participate in the Incarnation by being a member of Christ's mystical body. How beautiful and awesome is the invitation we receive to be Christ's hands and feet and voice as He ministers to and through us!