Who interrupts the conversation of others that they may know his excellence, they will become acquainted only with the degree of his folly.
An intelligent man will not give a reply
Unless he be asked a question.
Because though his words may be based on truth,
His claim to veracity may be deemed impossible.
Saadi Shirazi
http://www.poemhunter.com/poem/ch-08-on-rules-for-conduct-in-life-maxim-58/
