Matthew 5:8
“Blessed are the pure in heart: for they shall see God.”
Blessed are they which do hunger and thirst after righteousness: for they shall be filled.
Blessed are the merciful: for they shall obtain mercy.
Blessed are the pure in heart: for they shall see God.
Blessed are the peacemakers: for they shall be called the children of God.
Blessed are they which are persecuted for righteousness’ sake: for theirs is the kingdom of heaven.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Create in me a clean heart, O God; and renew a right spirit within me.”
“He that hath clean hands, and a pure heart; who hath not lifted up his soul unto vanity, nor sworn deceitfully.”
“Create in me a clean heart, O God; and renew a right spirit within me.”
“Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.”
“Follow peace with all men, and holiness, without which no man shall see the Lord:”