It is a good thing to use the tongue sparingly, and to keep a calm and rightly balanced heart in the use of speech. For it is not right to say things that are foolish and absurd, or to utter all that occurs to the mind. We ought instead to know and reflect that, though we are far separated from heaven, God hears what we say, and that it is good for us to speak without offense.
–Saint Gregory Thaumaturgus ( c. 213– c. 270)