This sermon delves into the profound meaning of Matthew 6:21, emphasizing that one's treasure dictates the location of one's heart and is a crucial teaching for a fruitful Lent. The central theme explored is the sin of attachment, which acts as a major impediment to spiritual life, illustrated through the cautionary example of Judas Iscariot, whose love of money consumed his entire being and led to betrayal. In contrast, the remedy presented is the virtue of alienation or "detachment from the world," recognizing that believers are merely strangers and pilgrims on Earth, as exemplified by figures like Abraham, whose heart was attached only to a heavenly dwelling. The message ultimately urges listeners to self-examine where their true treasure lies—in fleeting worldly things or in the eternal heavenly country—because the heart will inevitably follow.