Today we celebrate a feast that may seem at first glance to be irrelevant to contemporary life. The Feast of the Sacred Heart developed in part as a response to pre-destinationist theologies which diminished the universality of the gratuitous love of God and consigned many to perdition. But the Church's own theology of grace and freedom point directly to the reality of the human heart -- that center of the human person where God freely speaks himself and human beings respond in ways which are salvific for them and for the rest of the world. It asks us to see all persons as constituted in this way and called to life in and of God. Today's Feast of the Sacred Heart, then, despite the shift in context, asks us to reflect again on the nature of the human heart, to the greatest danger to spiritual or authentically human life the Scriptures identify, and too, on what a contemporary devotion to the Sacred Heart might mean for us.
In such cases our hearts are not only wounded but become scarred, indurated, less sensitive to pain (or pleasure), stiff and relatively inflexible. They, quite literally, become "hardened" and we may be fearful and unwilling or even unable to risk further injury. When the Scriptures speak of the "hardening" of our hearts they use the very words medicine uses to speak of the result of serious and prolonged wounding: induration, sclerosis, callousedness. Such hardening is self-protective but it also locks us into a world which makes us less capable of responding to love with all of its demands and riskiness. It makes us incapable of suffering well (patiently, fruitfully), or of real selflessness, generosity, or compassion.
Like the Sacred Heart our own hearts are meant to be "externalized" in a sense and (made) transparent to others. They are meant to be wounded by love and deeply touched by the pain of others but not scarred or indurated in that woundedness; they are meant to be compassionate hearts on fire with love and poured out for others --- hearts which are marked by the cross in all of its kenotic (self-emptying) dimensions and therefore too by the joy of ever-new life. The truly human heart is a reparative heart which heals the woundedness of others and empowers them to love as well. Such hearts are hearts which love as God loves, and therefore which do justice. I think that allowing our own hearts to be remade in this way represents an authentic devotion to Jesus' Sacred Heart. There is nothing lacking in relevance or contemporaneity in that!