Blessed are the pure in heart: for they shall see God.
All Commentaries on Matthew 5:8 Go To Matthew 5
Augustine of Hippo
AD 430
Understanding corresponds to the pure in heart, the eye being as it were purged, by which that may be beheld which eye has not seen, nor ear heard, and what has not entered into the heart of man: and of them it is here said, Blessed are the pure in heart.