Quotes by St. Maximus the Confessor ~ on Rancor

Rancor
       
       If you are remembering evil against someone, then pray for him; and as you remove through  
       prayer the pain of the remembrance of the evil he has done, you will stop the advance of the
       passion. And when you have attained brotherly love and love for mankind, you will completely
       cast this passion out of your soul. Then when someone else does evil to you, be affectionate and
       humble toward him, and treat him kindly, and you will deliver him from this passion.
(St. Maximus the Confessor, Chapters on Love, 3.90)    


        A soul that is nurtured by hatred toward man can not be at peace with God, Who has said: If you
        forgive not men their sins, neither shall your Father forgive your sins (Matt. 6:15). If a man does
        not want to be reconciled, you must at least guard yourself from hating, praying with a pure
        heart for him, and speaking no evil of him.
       
(St. Maximus the Confessor, Chapters on Love, 4.35)



Source:

http://orthodox.cn/patristics/300sayings_en.htm