“The pure of heart are those who have gotten rid of sin’s filth, have cleansed themselves of all the pollution of the flesh and have pleased God through works of faith and justice…the Lord shows that it is pure-hearted people like this who are blessed. They are those who, living by faith in God with a pure mind and unstained conscience, will win the right to see the God of glory in the heavenly kingdom to come, “no longer in a mirror and in riddles, but face to face,” as the apostle has said.”
(Chromatius, commentary on Matthew)