8 And since there is in the Sacred Heart a symbol and a sensible image of the infinite love of Jesus Christ which moves us to love one another, therefore is it fit and proper that we should consecrate ourselves to His most Sacred Heart-an act which is nothing else than an offering and a binding of oneself to Jesus Christ, seeing that whatever honor, veneration and love is given to this divine Heart is really and truly given to Christ Himself.
Source: Annum Sacrum (Vatican.va)