Prayer allows us to adore God, by acknowledging his almighty power; prayers allow us to bring our thanks, our petitions, and our sorrow for sin before our Lord and God. The catechism teaches us some important aspects on prayer.
While prayer is not a practice unique to Catholics, Catholic prayers are generally formulaic in nature. That is, the teaching Church sets before us how we ought to pray. Drawing from the words of Christ, the writings of Scripture and the saints, and the guidance of the Holy Spirit, she supplies us with prayers grounded in Christian tradition. Further, our informal, spontaneous prayers, both vocal and meditative, are informed by and shaped by those Catholic prayers taught by the Church. "Without the Holy Spirit speaking through the Church and through her saints, we would not know how to pray as we ought" (CCC 2650).
-Response given by P. Dominic Feehan, SHM