Catechism of the Catholic Church

The liturgical word and action are inseparable both insofar as they are signs and instruction and insofar as they accomplish what they signify. When the Holy Spirit awakens faith, he not only gives an understanding of the Word of God, but through the sacraments also makes present the "wonders" of God which it proclaims. The Spirit makes present and communicates the Father's work, fulfilled by the beloved Son. (1127)