In classical Greek, the word kardía denotes the inmost part of human beings, animals and plants. For Homer, it indicates not only the centre of the body, but also the human soul and spirit. In the Iliad, thoughts and feelings proceed from the heart and are closely bound one to another. 2Cf. HOMER, Iliad, XXI, 441. The heart appears as the locus of desire and the place where important decisions take shape. 3Cf. Iliad, X, 244. In Plato, the heart serves, as it were, to unite the rational and instinctive aspects of the person, since the impulses of both the higher faculties and the passions were thought to pass through the veins that converge in the heart. 4Cf. PLATO, Timaeus, 65 c-d; 70. From ancient times, then, there has been an appreciation of the fact that human beings are not simply a sum of different skills, but a unity of body and soul with a coordinating centre that provides a backdrop of meaning and direction to all that a person experiences.
The Bible tells us that, “the Word of God is living and active... it is able to judge the thoughts and intentions of the heart” (Heb 4:12). In this way, it speaks to us of the heart as a core that lies hidden beneath all outward appearances, even beneath the superficial thoughts that can lead us astray. The disciples of Emmaus, on their mysterious journey in the company of the risen Christ, experienced a moment of anguish, confusion, despair and disappointment. Yet, beyond and in spite of this, something was happening deep within them: “Were not our hearts burning within us while he was talking to us on the road?” (Lk 24:32).
The heart is also the locus of sincerity, where deceit and disguise have no place. It usually indicates our true intentions, what we really think, believe and desire, the “secrets” that we tell no one: in a word, the naked truth about ourselves. It is the part of us that is neither appearance or illusion, but is instead authentic, real, entirely “who we are”. That is why Samson, who kept from Delilah the secret of his strength, was asked by her, “How can you say, ‘I love you’, when your heart is not with me?” (Judg 16:15). Only when Samson opened his heart to her, did she realize “that he had told her his whole secret” (Judg 16:18).
This interior reality of each person is frequently concealed behind a great deal of “foliage”, which makes it difficult for us not only to understand ourselves, but even more to know others: “The heart is devious above all else; it is perverse, who can understand it?” (Jer 17:9). We can understand, then, the advice of the Book of Proverbs: “Keep your heart with all vigilance, for from it flow the springs of life; put away from you crooked speech” (4:23-24). Mere appearances, dishonesty and deception harm and pervert the heart. Despite our every attempt to appear as something we are not, our heart is the ultimate judge, not of what we show or hide from others, but of who we truly are. It is the basis for any sound life project; nothing worthwhile can be undertaken apart from the heart. False appearances and untruths ultimately leave us empty-handed.
As an illustration of this, I would repeat a story I have already told on another occasion. “For the carnival, when we were children, my grandmother would make a pastry using a very thin batter. When she dropped the strips of batter into the oil, they would expand, but then, when we bit into them, they were empty inside. In the dialect we spoke, those cookies were called ‘lies’… My grandmother explained why: ‘Like lies, they look big, but are empty inside; they are false, unreal’”. 5Homily at Morning Mass in Domus Sanctae Marthae, 14 October 2016: L’Osservatore Romano, 15 October 2016, p. 8.
Instead of running after superficial satisfactions and playing a role for the benefit of others, we would do better to think about the really important questions in life. Who am I, really? What am I looking for? What direction do I want to give to my life, my decisions and my actions? Why and for what purpose am I in this world? How do I want to look back on my life once it ends? What meaning do I want to give to all my experiences? Who do I want to be for others? Who am I for God? All these questions lead us back to the heart.