The Son of Man is destined to suffer grievously
Jesus and his disciples left for the villages round Caesarea Philippi. On the way he put this question to his disciples, ‘Who do people say I am?’ And they told him. ‘John the Baptist,’ they said ‘others Elijah; others again, one of the prophets.’ ‘But you,’ he asked ‘who do you say I am?’ Peter spoke up and said to him, ‘You are the Christ.’ And he gave them strict orders not to tell anyone about him.
And he began to teach them that the Son of Man was destined to suffer grievously, to be rejected by the elders and the chief priests and the scribes, and to be put to death, and after three days to rise again; and he said all this quite openly. Then, taking him aside, Peter started to remonstrate with him. But, turning and seeing his disciples, he rebuked Peter and said to him, ‘Get behind me, Satan! Because the way you think is not God’s way but man’s.’
He called the people and his disciples to him and said, ‘If anyone wants to be a follower of mine, let him renounce himself and take up his cross and follow me. For anyone who wants to save his life will lose it; but anyone who loses his life for my sake, and for the sake of the gospel, will save it.’
Source: Jerusalem Bible
Catechism of the Catholic Church
Christ’s soul and his human knowledge
471 Apollinarius of Laodicaea asserted that in Christ the divine Word had replaced the soul or spirit. Against this error the Church confessed that the eternal Son also assumed a rational, human soul.
472 This human soul that the Son of God assumed is endowed with a true human knowledge. As such, this knowledge could not in itself be unlimited: it was exercised in the historical conditions of his existence in space and time. This is why the Son of God could, when he became man, “increase in wisdom and in stature, and in favor with God and man”, and would even have to inquire for himself about what one in the human condition can learn only from experience. This corresponded to the reality of his voluntary emptying of himself, taking “the form of a slave”.
473 But at the same time, this truly human knowledge of God’s Son expressed the divine life of his person. “The human nature of God’s Son, not by itself but by its union with the Word, knew and showed forth in itself everything that pertains to God.” Such is first of all the case with the intimate and immediate knowledge that the Son of God made man has of his Father. The Son in his human knowledge also showed the divine penetration he had into the secret thoughts of human hearts.
474 By its union to the divine wisdom in the person of the Word incarnate, Christ enjoyed in his human knowledge the fullness of understanding of the eternal plans he had come to reveal. What he admitted to not knowing in this area, he elsewhere declared himself not sent to reveal.
I love the LORD, who listened to my voice in supplication,
Who turned an ear to me on the day I called.
I was caught by the cords of death; the snares of Sheol had seized me; I felt agony and dread.
Then I called on the name of the LORD, “O LORD, save my life!”
Gracious is the LORD and just; yes, our God is merciful.
The LORD protects the simple; I was helpless, but God saved me.
Return, my soul, to your rest; the LORD has been good to you.
For my soul has been freed from death, my eyes from tears, my feet from stumbling.
I shall walk before the LORD in the land of the living.
I kept faith, even when I said, “I am greatly afflicted!”
I said in my alarm, “No one can be trusted!”
How can I repay the LORD for all the good done for me?
I will raise the cup of salvation and call on the name of the LORD.
I will pay my vows to the LORD in the presence of all his people.
Too costly in the eyes of the LORD is the death of his faithful.
LORD, I am your servant, your servant, the child of your maidservant; you have loosed my bonds.
I will offer a sacrifice of thanksgiving and call on the name of the LORD.
I will pay my vows to the LORD in the presence of all his people,
In the courts of the house of the LORD, in your midst, O Jerusalem. Hallelujah!
Source: The New American Bible