Gregory of Nyssa: ”‘Blessed are the peacemakers, for they shall be called sons of God.’[...]"
”‘Blessed are the peacemakers, for they shall be called sons of God.’ Who are these? Those who imitate the Divine love of others, who show forth in their own life the characteristic of the Divine energy. The Lord and Giver of good things completely annihilates anything that is without affinity and foreign to goodness. This work He ordains also for you, namely to cast out hatred and abolish war, to exterminate envy and banish strife, to take away hypocrisy and extinguish from within resentment of injuries smoldering in the heart. Instead, you ought to introduce whatever is contrary to the things that have been removed.” (The Lord’s Prayer and the Beatitudes, Ancient Christian Writers series, Newman Press)