Petition is a form of prayer in which we ask the Lord for what we need.
First and foremost is our need for forgiveness: because our relationship with God is the “one thing necessary,” we want to preserve it, protect it, and nurture it above all else. Each and every sin frays this relationship, and mortal sin ruptures it (which is why we seek an encounter with the Lord in the Sacrament of Reconciliation to heal and restore it).
When we realize that we have hurt God, and others, through our faults and failings, we are moved to ask for His mercy. Sometimes we can fall into the bad habit of taking sin lightly and treating forgiveness as a mere formality. While God is eager to forgive, He wants us to repent truly, and recognize sin for the evil that it is.
So important is it to ask for forgiveness, that the Catechism describes it as a “prerequisite for righteous and pure prayer.”
Another vital need for which we pray is the coming of the Kingdom, as Jesus taught us. This petition involves not only beseeching the Lord to bring salvation history to its culmination, but also asking that we may receive His help in striving toward, and cooperating with, the Kingdom’s coming.
Because “the seed and beginning of the Kingdom” on earth is the Church, our petition for the Kingdom also involves the building up, the flourishing, of the Church here in the world.
Of course, we have many other needs in our daily lives, and we are encouraged to bring these too – even the small ones – before the Lord in our prayers of petition: “Christ, who assumed all things in order to redeem all things, is glorified by what we ask the Father in His Name.”
This is especially helpful for family prayer time, when children may be invited to offer their own petitions.