CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 2826–2829

2826 By prayer we can discern "what is the will of God" and obtain the endurance to do it. Jesus teaches us that one enters the kingdom of heaven not by speaking words, but by doing "the will of my Father in heaven."
2827 "If any one is a worshiper of God and does his will, God listens to him." Such is the power of the Church's prayer in the name of her Lord, above all in the Eucharist. Her prayer is also a communion of intercession with the all-holy Mother of God and all the saints who have been pleasing to the Lord because they willed his will alone:

It would not be inconsistent with the truth to understand the words, "Thy will be done on earth as it is in heaven," to mean: "in the Church as in our Lord Jesus Christ himself"; or "in the Bride who has been betrothed, just as in the Bridegroom who has accomplished the will of the Father."

2828 "Give us": The trust of children who look to their Father for everything is beautiful. "He makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust." He gives to all the living "their food in due season." Jesus teaches us this petition, because it glorifies our Father by acknowledging how good he is, beyond all goodness.
2829 "Give us" also expresses the covenant. We are his and he is ours, for our sake. But this "us" also recognizes him as the Father of all men and we pray to him for them all, in solidarity with their needs and sufferings.