Blessed are the pure in heart: for they shall see God.
All Commentaries on Matthew 5:8 Go To Matthew 5
John Chrysostom
AD 407
Behold again the reward is spiritual. Now He here calls pure, either those who have attained unto all virtue, and are not conscious to themselves of any evil; or those who live in temperance. For there is nothing which we need so much in order to see God, as this last virtue. Wherefore Paul also said, Follow peace with all men, and holiness, without which no man shall see the Lord. Hebrews 12:14 He is here speaking of such sight as it is possible for man to have.
For because there are many who show mercy, and who commit no rapine, nor are covetous, who yet are guilty of fornication and uncleanness; to signify that the former alone suffices not, He has added this, much in the same sense as Paul, writing to the Corinthians, bore witness of the Macedonians, that they were rich not only in almsgiving, but also in all other virtue. For having spoken of the noble spirit they had shown in regard of their goods, he says, They gave also their own selves to the Lord, and to us. 2 Corinthians 8:5