Give preference to your brother in everything. Let deference towards others characterize you. In the name of God, do not quarrel, do not criticize. These are not actions of a monk, but of a worldly person far from God. You are dedicated to God; whatever He wants is what you should do—this is what should govern your conduct towards others.
When you see that you are quarreling, etc., you should realize that you are doing the devil’s will and that God is greatly distressed. The angels who see you say with sorrow, “What’s wrong with him that makes him fight? Doesn’t he take into consideration God’s commandment to love?” Whereas, when they see you sacrificing yourself for the love of Christ, they rejoice and glorify God, Who gives His grace so that man may conquer the devil.
From the book
Councels from the Holy mountain
Selected from the letters and homilies of Elder Efraim of Arizona
subm. no. 9
paragraphs: 11-14 from pages 247-248