65 The image of the Lord’s heart speaks to us in fact of a threefold love. First, we contemplate his infinite divine love. Then our thoughts turn to the spiritual dimension of his humanity, in which the heart is “the symbol of that most ardent love which, infused into his soul, enriches his human will”. Finally, “it is a symbol also of his sensible love”.
Source: Dilexit Nos (Vatican.va)