Why should we go to church?

In the first document mentioned in my last blog,
(http://www.ewtn.com/library/councils/v2litur.htm) the Second Vatican Council explains why we should go to church:

While the liturgy daily builds up those who are within into a holy temple of the Lord, into a dwelling place for God in the Spirit (3), to the mature measure of the fullness of Christ (4), at the same time it marvelously strengthens their power to preach Christ, and thus shows forth the Church to those who are outside as a sign lifted up among the nations (5) under which the scattered children of God may be gathered together (6), until there is one sheepfold and one shepherd (7).

Makes sense to me: the liturgy builds us up and strengthens our power to preach Christ, showing the Church to others, so that they may also be gathered together.

This must be why every time I go to mass and receive the Holy Eucharist, I feel better, more alive, energized.