"Blessed are the pure in heart, for they shall see God." -- Matt 5:8

"Who is pure in heart? Only those who have surrendered their hearts completely to Jesus that he may reign in them alone. Only those whose hearts are undefiled by their own evil--and by their own virtues too. The pure in heart have a child-like simplicity like Adam before the fall, innocent alike of good and evil: their hearts are not ruled by their conscience, but by the will of Jesus. If men renounce their own good, if in penitence they have renounced their own hearts, if they rely solely upon Jesus, then his word purifies their hearts. Purity of heart is here contrasted with all outward purity, even the purity of high intentions. The pure heart is pure alike of good and evil, it belongs exclusively to Christ and looks only to him who goes on before. Only they will see God, who in this life have looked solely unto Jesus Christ, the Son of God. For then their hearts are free of all defiling phantasies and are not distracted by conflicting desires and intentions. They are wholly absorbed by the contemplation of God. They shall see God, whose hearts have become a reflection of the image of Jesus Christ." -- Dietrich Bonhoeffer