God is not a God of war and fighting. Make war and fighting to cease, both that which is against Him, and that which is against your neighbor. Be at peace with all men, consider with what character God saves you. Blessed are the peacemakers, for they shall be called sons of God (Matthew 5:9). Such always imitate the Son of God: you imitate Him too. Be at peace.
The more your brother wars against you, by so much the greater will be your reward. For hear the prophet who says, With the haters of peace I was peaceful (Psalm 120:7) This is virtue, this is above man’s understanding, this makes us near God; nothing so much delights God as to remember no evil. This sets you free from your sins, this looses the charges against you: but if we are fighting and buffeting, we become far off from God: for enmities are produced by conflict, and from enmity springs remembrance of evil.
[St. John Chrysostom, Homily XIV on Philippians]