And now the time has come for us to return into the world. “Let us depart in peace,” says the celebrant as he leaves the altar, and this is the last commandment of the liturgy. We must not stay on Mount Tabor, although we know that it is good for us to be there. We are sent back. But now “we have seen the true Light, we have received the heavenly Spirit.” And it is as witnesses of this Light, as witnesses of the Spirit, that we must “go forth” and begin the never-ending mission of the church. Eucharist was the end of the journey, the end of time. And now it is again the beginning, and things that were impossible are again revealed to us as possible. The time of the world has become the time of the Church, the time of salvation and redemption. And God has made us competent, as Paul Claudel has said, competent to be His witnesses, to fulfill what He has done and is ever doing. This is the meaning of the Eucharist; this is why the mission of the Church begins in the liturgy of ascension, for it alone makes possible the liturgy of mission.
—Alexander Schmemann, For the Life of the World, 45-46