Just as God assumed a body and entered the time and space of this world, so it is appropriate to prayer—at least to communal liturgical prayer—that our speaking to God should be “incarnational”, that it should be Christological, turned through the incarnate Word to the triune God.

Joseph Ratzinger, The Spirit of the Liturgy, trans. John Saward (San Francisco: Ignatius Press, 2000), page 76.

My comments:  To understand this think about John 14:6 “I am the way, and the truth, and the life; no one comes to the Father, but by me. (RSV2CE)
It is through Jesus we can go the the Father as well as the Holy Spirit.