Jesus said to his disciples:
‘Suppose one of you has a friend and goes to him in the middle of the night to say, “My friend, lend me three loaves, because a friend of mine on his travels has just arrived at my house and I have nothing to offer him”; and the man answers from inside the house, “Do not bother me. The door is bolted now, and my children and I are in bed; I cannot get up to give it you.” I tell you, if the man does not get up and give it him for friendship’s sake, persistence will be enough to make him get up and give his friend all he wants.
‘So I say to you: Ask, and it will be given to you; search, and you will find; knock, and the door will be opened to you. For the one who asks always receives; the one who searches always finds; the one who knocks will always have the door opened to him. What father among you would hand his son a stone when he asked for bread? Or hand him a snake instead of a fish? Or hand him a scorpion if he asked for an egg? If you then, who are evil, know how to give your children what is good, how much more will the heavenly Father give the Holy Spirit to those who ask him!’
Source: Jerusalem Bible
Catechism of the Catholic Church
Jesus teaches us how to pray
2607 When Jesus prays he is already teaching us how to pray. His prayer to his Father is the theological path (the path of faith, hope, and charity) of our prayer to God. But the Gospel also gives us Jesus’ explicit teaching on prayer. Like a wise teacher he takes hold of us where we are and leads us progressively toward the Father. Addressing the crowds following him, Jesus builds on what they already know of prayer from the Old Covenant and opens to them the newness of the coming Kingdom. Then he reveals this newness to them in parables. Finally, he will speak openly of the Father and the Holy Spirit to his disciples who will be the teachers of prayer in his Church.
2608 From the Sermon on the Mount onwards, Jesus insists on conversion of heart: reconciliation with one’s brother before presenting an offering on the altar, love of enemies, and prayer for persecutors, prayer to the Father in secret, not heaping up empty phrases, prayerful forgiveness from the depths of the heart, purity of heart, and seeking the Kingdom before all else. This filial conversion is entirely directed to the Father.
2609 Once committed to conversion, the heart learns to pray in faith. Faith is a filial adherence to God beyond what we feel and understand. It is possible because the beloved Son gives us access to the Father. He can ask us to “seek” and to “knock,” since he himself is the door and the way.
2610 Just as Jesus prays to the Father and gives thanks before receiving his gifts, so he teaches us filial boldness: “Whatever you ask in prayer, believe that you receive it, and you will.” Such is the power of prayer and of faith that does not doubt: “all things are possible to him who believes.” Jesus is as saddened by the “lack of faith” of his own neighbors and the “little faith” of his own disciples as he is struck with admiration at the great faith of the Roman centurion and the Canaanite woman.
2611 The prayer of faith consists not only in saying “Lord, Lord,” but in disposing the heart to do the will of the Father. Jesus calls his disciples to bring into their prayer this concern for cooperating with the divine plan.
2612 In Jesus “the Kingdom of God is at hand.” He calls his hearers to conversion and faith, but also to watchfulness. In prayer the disciple keeps watch, attentive to Him Who Is and Him Who Comes, in memory of his first coming in the lowliness of the flesh, and in the hope of his second coming in glory. In communion with their Master, the disciples’ prayer is a battle; only by keeping watch in prayer can one avoid falling into temptation.
2613 Three principal parables on prayer are transmitted to us by St. Luke:
– The first, “the importunate friend,” invites us to urgent prayer: “Knock, and it will be opened to you.” To the one who prays like this, the heavenly Father will “give whatever he needs,” and above all the Holy Spirit who contains all gifts.
– The second, “the importunate widow,” is centered on one of the qualities of prayer: it is necessary to pray always without ceasing and with the patience of faith. “And yet, when the Son of Man comes, will he find faith on earth?”
– The third parable, “the Pharisee and the tax collector,” concerns the humility of the heart that prays. “God, be merciful to me a sinner!” The Church continues to make this prayer its own: Kyrie eleison!
2614 When Jesus openly entrusts to his disciples the mystery of prayer to the Father, he reveals to them what their prayer and ours must be, once he has returned to the Father in his glorified humanity. What is new is to “ask in his name.” Faith in the Son introduces the disciples into the knowledge of the Father, because Jesus is “the way, and the truth, and the life.” Faith bears its fruit in love: it means keeping the word and the commandments of Jesus, it means abiding with him in the Father who, in him, so loves us that he abides with us. In this new covenant the certitude that our petitions will be heard is founded on the prayer of Jesus.
2615 Even more, what the Father gives us when our prayer is united with that of Jesus is “another Counselor, to be with you for ever, even the Spirit of truth.” This new dimension of prayer and of its circumstances is displayed throughout the farewell discourse. In the Holy Spirit, Christian prayer is a communion of love with the Father, not only through Christ but also in him: “Hitherto you have asked nothing in my name; ask, and you will receive, that your joy may be full.”
Happy those who do not follow the counsel of the wicked, Nor go the way of sinners, nor sit in company with scoffers.
Rather, the law of the LORD is their joy; God’s law they study day and night.
They are like a tree planted near streams of water, that yields its fruit in season; Its leaves never wither; whatever they do prospers.
But not the wicked! They are like chaff driven by the wind.
Therefore the wicked will not survive judgment, nor will sinners in the assembly of the just.
The LORD watches over the way of the just, but the way of the wicked leads to ruin.
Source: The New American Bible