Prayer and liturgy
The liturgy is also a participation in Christ's own prayer addressed to the Father in the Holy Spirit. In the liturgy, all Christian prayer finds its source and goal. Through the liturgy the inner man is rooted and grounded in "the great love with which [the Father] loved us" in his beloved Son. It is the same "marvelous work of God" that is lived and internalized by all prayer, "at all times in the Spirit."
Source: Catechism of the Catholic Church (Vatican.va)