“Let there be a door to your mouth, that it may be shut when need arises, and let it be carefully barred, that none may rouse your voice to anger, and you pay back abuse with abuse. You have heard it read today: “Be angry, and sin not.” Therefore although we are angry (this arising from the emotions of our nature, not of our will), let us not utter with our mouth one evil word, lest we fall into sin…”
(St. Augustine in ‘Duties’)

 

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