In the liturgy, our words and actions are not merely those of individuals, but of the body. We speak together, sing together, pray together, listen together, and eat together as a body. At first it seems weird to us to worship like this - and this is, I think, for two reasons.
First, because of the fall we are inclined to think primarily of ourselves. We are self-interested, self-focused, self-absorbed.
Secondly, it is because this way of being has been sewn into the fabric of our culture. We are conditioned by our culture to be opposed to anything that causes us to conform to others.
and that being a part of the body is where we find our true identity.
As we do all of these things together, we are pushed outside of ourselves,
and we become more truly who our Lord wants us to be.