70 Devotion to the heart of Jesus, as a direct contemplation of the Lord that draws us into union with him, is clearly Christological in nature. We see this in the Letter to the Hebrews, which urges us to “run with perseverance the race that is set before us, looking to Jesus” (12:2). At the same time, we need to realize that Jesus speaks of himself as the way to the Father: “I am the way… No one comes to the Father except through me” ( Jn 14:6). Jesus wants to bring us to the Father. That is why, from the very beginning, the Church’s preaching does not end with Jesus, but with the Father. As source and fullness, the Father is ultimately the one to be glorified.
Source: Dilexit Nos (Vatican.va)