Let your demeanor, your dress, your walking, your sitting down, the nature of your food, the quality of your being, your house and what it contains, aim at simplicity.
And let your speech, your singing, your manner with your neighbor, let these things also be in accord with humility rather than with vanity.
In your words let there be no empty pretence, in your singing no excess sweetness, in conversation be not ponderous or overbearing. In everything refrain from seeking to appear important.
Be a help to your friends, kind to the ones with whom you live, gentle to your servant, patient with those who are troublesome, loving towards the lowly, comforting those in trouble, visiting those in affliction, never despising anyone, gracious in friendship, cheerful in answering others, courteous, approachable to everyone, never speaking your own praises, nor getting others to speak of them, never taking part in unbecoming conversations, and concealing where you may whatever gifts you posses.”
St. Basil the Great, Homily on Humility, 20