Jamie sermon on "Blessed are the Pure in Heart" explores the Beatitudes, focusing on the transformation that leads to purity of heart and the vision of God. Jamie emphasizes the inward condition over outward religious practices, arguing that true change begins within, at the heart level. He discusses the concept of purity as singleness of devotion to God, contrasting it with the distractions and temptations of the world. Through faith and the Holy Spirit's work, believers can see God now and anticipate a fuller vision in the future, leading to a life marked by peace, focus, and alignment with God's will.