“A Christian must be courteous to all. His words and deeds should breathe with the grace of the Holy Spirit, which abides in his soul, so that in this way he might glorify the name of God. He who regulates all of his speech also regulates all of his actions. He who keeps watch over the words he is about say also keeps watch over the deeds he intends to do, and he never goes out of the bounds good and benevolent conduct.”
(St. Nektarius of Aegina, The Path to Happiness)