
Augustine of Hippo
Catena Aurea · Matthäusevangelium 5
Blessed are the pure in heart: for they shall see God.
(Serm. in Mont. i. 2.) They are foolish who seek to see God with the bodily eye, seeing He is seen only by the heart, as it is elsewhere written, In singleness of heart seek ye Him; (Wisd. 1:1.) the single heart is the same as is here called the pure heart.