4 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).
Source: Dilexit Nos (Vatican.va)