A wise man, intending to speak, first carefully considers what he is to say, and to whom he is to say it; also where and at what time. There is therefore such a thing as due measure in keeping silence and also in speaking; there is also such a thing as a due measure in what we do. It is a glorious thing to maintain the right standard of duty.
– Saint Ambrose of Milan (337-397), Doctor of the Church, Feast day December 7
A Journey of Faith 