You wont find any prayer in scripture that isn’t found in some way in the Lord’s Prayer, St. Augustine writes to Proba, a Roman woman looking for advice about how to pray.
Jesus himself gave this prayer to us. The words of the prayer are teachers of prayer, a school of prayer. No prayer is more important than the Our Father for teaching and leading us into union with God.
“Teach us to pray,” the disciples of Jesus ask him and gave them this prayer as their norm.
It’s a norm, Augustine tells Proba, ” So when we pray we are free to use different words to any extent, but we must ask the same things: in this we have no choice.”
The saint is recommending we pray the Our Father meditatively, a prayer that easily becomes one we say by rote. Think of the words, what they mean, what they tell us. Sometimes it’s good to leave long prayers or many prayers, and simply rest in one, like the Our Father.