Beside the streamlet seated, mark how life glides on: That sign, how swift each moment goes, to me?s enough. Behold this world?s delights, and view its various pains: If not to you, the joy it shows to me?s enough.

Hafiz

Speak but little, and that little only when thy own purposes require it. Heaven has given thee two ears but only one tongue, which means: listen to two things, but be not the first to propose one.