CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 2627–2631

2627 Two fundamental forms express this movement: our prayer ascends in the Holy Spirit through Christ to the Father - we bless him for having blessed us; it implores the grace of the Holy Spirit that descends through Christ from the Father - he blesses us.
2628 Adoration is the first attitude of man acknowledging that he is a creature before his Creator. It exalts the greatness of the Lord who made us and the almighty power of the Savior who sets us free from evil. Adoration is homage of the spirit to the "King of Glory," respectful silence in the presence of the "ever greater" God. Adoration of the thrice-holy and sovereign God of love blends with humility and gives assurance to our supplications.
2629 The vocabulary of supplication in the New Testament is rich in shades of meaning: ask, beseech, plead, invoke, entreat, cry out, even "struggle in prayer." Its most usual form, because the most spontaneous, is petition: by prayer of petition we express awareness of our relationship with God. We are creatures who are not our own beginning, not the masters of adversity, not our own last end. We are sinners who as Christians know that we have turned away from our Father. Our petition is already a turning back to him.
2630 The New Testament contains scarcely any prayers of lamentation, so frequent in the Old Testament. In the risen Christ the Church's petition is buoyed by hope, even if we still wait in a state of expectation and must be converted anew every day. Christian petition, what St. Paul calls {"groaning," arises from another depth, that of creation "in labor pains" and that of ourselves "as we wait for the redemption of our bodies. For in this hope we were saved." In the end, however, "with sighs too deep for words" the Holy Spirit "helps us in our weakness; for we do not know how to pray as we ought, but the Spirit himself intercedes for us with sighs too deep for words."
2631 The first movement of the prayer of petition is asking forgiveness, like the tax collector in the parable: "God, be merciful to me a sinner!" It is a prerequisite for righteous and pure prayer. A trusting humility brings us back into the light of communion between the Father and his Son Jesus Christ and with one another, so that "we receive from him whatever we ask." Asking forgiveness is the prerequisite for both the Eucharistic liturgy and personal prayer.