TabernaclePope Benedict XVI on the Reservation of the Blessed Sacrament (From The Spirit of the Liturgy)

For this Presence [of our Lord in the Blessed Sacrament] has the effect, of course, of keeping the Eucharist forever in church (the building). The church never becomes a lifeless space, but is filled with the presence of the Lord, which comes out of the [Eucharistic] celebration, leads us into it, and always makes us participants in the cosmic Eucharist. What men of faith have not experienced this? A church without the Eucharistic presence is somehow dead even when it invites people to pray. But a church in which the eternal light is burning before the tabernacle is always alive, is always something more than a building made of stones. In this place the Lord is always waiting for me, calling me, wanting to make me "Eucharistic." In this way he prepares me for the Eucharist, sets me in motion toward his return.

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