61 Since the heart continues to be seen in the popular mind as the affective centre of each human being, it remains the best means of signifying the divine love of Christ, united forever and inseparably to his wholly human love. Pius XII observed that the Gospel, in referring to the love of Christ’s heart, speaks “not only of divine charity but also human affection”. Indeed, “the heart of Jesus Christ, hypostatically united to the divine Person of the Word, beyond doubt throbbed with love and every other tender affection”.
Source: Dilexit Nos (Vatican.va)