Youcat commented through CCC - Question n. 78 - Part V.

YOUCAT Question n. 78 - Part V. Why can we grasp Jesus only as a “mystery”?

(Youcat answer - repeated) Jesus extends into God; therefore we cannot understand him if we exclude the invisible divine reality.     

A deepening through CCC

(CCC 536) The baptism of Jesus is on his part the acceptance and inauguration of his mission as God's suffering Servant. He allows himself to be numbered among sinners; he is already "the Lamb of God, who takes away the sin of the world" (Jn 1:29; cf.  Isa 53:12). Already he is anticipating the "baptism" of his bloody death (Cf. Mk 10:38;  Lk 12:50). Already he is coming to "fulfill all righteousness", that is, he is submitting himself entirely to his Father's will: out of love he consents to this baptism of death for the remission of our sins (Mt 3:15; cf.  26:39). The Father's voice responds to the Son's acceptance, proclaiming his entire delight in his Son (Cf.  Lk 3:22; Isa 42:1). The Spirit whom Jesus possessed in fullness from his conception comes to "rest on him" (Jn 1:32-33; cf.  Isa 11:2). Jesus will be the source of the Spirit for all mankind. At his baptism "the heavens were opened" (Mt 3:16) - the heavens that Adam's sin had closed - and the waters were sanctified by the descent of Jesus and the Spirit, a prelude to the new creation.   

Reflecting and meditating 

(Youcat comment) The visible side of Jesus points to the invisible. We see in the life of Jesus numerous realities that are powerfully present but that we can understand only as a mystery. Examples of such mysteries are the divine Sonship, the Incarnation, the Passion, and the Resurrection of Christ.

(CCC Comment)

(CCC 727) The entire mission of the Son and the Holy Spirit, in the fullness of time, is contained in this: that the Son is the one anointed by the Father's Spirit since his Incarnation - Jesus is the Christ, the Messiah. Everything in the second chapter of the Creed is to be read in this light. Christ's whole work is in fact a joint mission of the Son and the Holy Spirit. Here, we shall mention only what has to do with Jesus' promise of the Holy Spirit and the gift of him by the glorified Lord.     

(The next question is: Did Jesus have a soul, a mind, and a body just as we do?)