Catechism of the Catholic Church

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. (165)