You are Peter and on this rock I will build my Church
When Jesus came to the region of Caesarea Philippi he put this question to his disciples, ‘Who do people say the Son of Man is?’ And they said, ‘Some say he is John the Baptist, some Elijah, and others Jeremiah or one of the prophets.’ ‘But you,’ he said ‘who do you say I am?’ Then Simon Peter spoke up, ‘You are the Christ,’ he said ‘the Son of the living God.’ Jesus replied, ‘Simon son of Jonah, you are a happy man! Because it was not flesh and blood that revealed this to you but my Father in heaven. So I now say to you: You are Peter and on this rock I will build my Church. And the gates of the underworld can never hold out against it. I will give you the keys of the kingdom of heaven: whatever you bind on earth shall be considered bound in heaven; whatever you loose on earth shall be considered loosed in heaven.’
Source: Jerusalem Bible
Catechism of the Catholic Church
436 The word “Christ” comes from the Greek translation of the Hebrew Messiah, which means “anointed”. It became the name proper to Jesus only because he accomplished perfectly the divine mission that “Christ” signifies. In effect, in Israel those consecrated to God for a mission that he gave were anointed in his name. This was the case for kings, for priests and, in rare instances, for prophets. This had to be the case all the more so for the Messiah whom God would send to inaugurate his kingdom definitively. It was necessary that the Messiah be anointed by the Spirit of the Lord at once as king and priest, and also as prophet. Jesus fulfilled the messianic hope of Israel in his threefold office of priest, prophet and king.
437 To the shepherds, the angel announced the birth of Jesus as the Messiah promised to Israel: “To you is born this day in the city of David a Savior, who is Christ the Lord.” From the beginning he was “the one whom the Father consecrated and sent into the world”, conceived as “holy” in Mary’s virginal womb. God called Joseph to “take Mary as your wife, for that which is conceived in her is of the Holy Spirit”, so that Jesus, “who is called Christ”, should be born of Joseph’s spouse into the messianic lineage of David.
438 Jesus’ messianic consecration reveals his divine mission, “for the name ‘Christ’ implies ‘he who anointed’, ‘he who was anointed’ and ‘the very anointing with which he was anointed’. The one who anointed is the Father, the one who was anointed is the Son, and he was anointed with the Spirit who is the anointing.'”35 His eternal messianic consecration was revealed during the time of his earthly life at the moment of his baptism by John, when “God anointed Jesus of Nazareth with the Holy Spirit and with power”, “that he might be revealed to Israel” as its Messiah. His works and words will manifest him as “the Holy One of God”.
439 Many Jews and even certain Gentiles who shared their hope recognized in Jesus the fundamental attributes of the messianic “Son of David”, promised by God to Israel. Jesus accepted his rightful title of Messiah, though with some reserve because it was understood by some of his contemporaries in too human a sense, as essentially political.
440 Jesus accepted Peter’s profession of faith, which acknowledged him to be the Messiah, by announcing the imminent Passion of the Son of Man. He unveiled the authentic content of his messianic kingship both in the transcendent identity of the Son of Man “who came down from heaven”, and in his redemptive mission as the suffering Servant: “The Son of Man came not to be served but to serve, and to give his life as a ransom for many.” Hence the true meaning of his kingship is revealed only when he is raised high on the cross. Only after his Resurrection will Peter be able to proclaim Jesus’ messianic kingship to the People of God: “Let all the house of Israel therefore know assuredly that God has made him both Lord and Christ, this Jesus whom you crucified.”
Rejoice, you just, in the LORD; praise from the upright is fitting.
Give thanks to the LORD on the harp; on the ten-stringed lyre offer praise.
Sing to God a new song; skillfully play with joyful chant.
For the LORD’S word is true; all his works are trustworthy.
The LORD loves justice and right and fills the earth with goodness.
By the LORD’S word the heavens were made; by the breath of his mouth all their host.
The waters of the sea were gathered as in a bowl; in cellars the deep was confined.
Let all the earth fear the LORD; let all who dwell in the world show reverence.
For he spoke, and it came to be, commanded, and it stood in place.
The LORD foils the plan of nations, frustrates the designs of peoples.
But the plan of the LORD stands forever, wise designs through all generations.
Happy the nation whose God is the LORD, the people chosen as his very own.
From heaven the LORD looks down and observes the whole human race,
Surveying from the royal throne all who dwell on earth.
The one who fashioned the hearts of them all knows all their works.
A king is not saved by a mighty army, nor a warrior delivered by great strength.
Useless is the horse for safety; its great strength, no sure escape.
But the LORD’S eyes are upon the reverent, upon those who hope for his gracious help,
Delivering them from death, keeping them alive in times of famine.
Our soul waits for the LORD, who is our help and shield.
For in God our hearts rejoice; in your holy name we trust.
May your kindness, LORD, be upon us; we have put our hope in you.
Source: The New American Bible