“Let silence be your general rule; or say only what is necessary and in few words.”
Golden Sayings of Epictetus
Context: Let silence be your general rule; or say only what is necessary and in few words. We shall, however, when occasion demands, enter into discourse sparingly, avoiding such common topics as gladiators, horse-races, athletes; and the perpetual talk about food and drink. Above all avoid speaking of persons, either in the way of praise or blame, or comparison. If you can, win over the conversation of your company to what it should be by your own. But if you should find yourself cut off without escape among strangers and aliens, be silent. (164).
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Epictetus 175
philosopher from Ancient Greece 50–138Related quotes

“A few rules include all that is necessary for the perfection of”
The Art of Persuasion
Context: A few rules include all that is necessary for the perfection of the definitions, the axioms, and the demonstrations, and consequently of the entire method of the geometrical proofs of the art of persuading.

Vol. I, ch. 11 http://books.google.com/books?id=R18JAAAAQAAJ&q=%22In+composing+as+a+general+rule+run+your+pen+through+every+other+word+you+have+written+you+have+no+idea+what+vigour+it+will+give+your+style%22&pg=PA382#v=onepage
Lady Holland's Memoir (1855)

With Open Hands (1972)
Context: Only within this kind of life does a spoken prayer make sense. A prayer in church, at table or in school is only a witness to what we want to make of our entire lives. Such a prayer reminds us that praying is living and it invites us to make this an ever-greater reality. Thus, there are as many ways to pray as there are moments in life. Sometimes we seek out a quiet spot and want to be alone, sometimes we look for a friend and want to be together. Sometimes we like a book, sometimes we prefer music. Sometimes we want to sing out with hundreds, sometimes only whisper with a few. Sometimes we want to say it with words, sometimes with a deep silence.

“Let your occupations be few," says the sage, "if you would lead a tranquil life.”
Ὀλίγα πρῆσσε, φησίν, εἰ μέλλεις εὐθυμήσειν
IV, 24
Meditations (c. 121–180 AD), Book IV

“Be silent or let thy words be worth more than silence.”

“From a few basic rules you can generate a cosmos.”
Brace Yourself: The Five Heresies
The God Problem: How a Godless Cosmos Creates (2012)