For an offence, whatever kind may have been given, one must not only not avenge oneself, but on the contrary must all the more forgive from the heart, even though it may resist this, and must incline the heart by conviction of the word of God: If ye forgive not men their trespasses, neither will your Father forgive your trespasses (Matt. 6:15); and again, Pray for them which despitefully use you (Matt. 5:44).
One must not nurse in one’s heart malice or hatred towards a neighbhor who bears ill-will; but we must strive to love him and, as much as possible, do good, following the teaching of our Lord Jesus Christ: Love your enemies, do good to them that hate you (Matt. 5:44).
And thus, if we will strive, as much as lies in our power, to fulfill all this, then we may hope that Divine light will shine early in our souls, opening to us the path to the Jerusalem on High.
Excerpt taken from the book: Little Russian Philokalia, Vol. I: St. Seraphim