The Prophet of Islam once observed, “One who believes in God and the Last Day should either speak words of goodness or keep quiet.” It is true that failure to speak up and tell the truth when the occasion calls for it can (according to a hadith) earn one the name of ‘dumb Satan.’ But, there are many occasions when observing silence is more proper and more important. One example of how essential it is to observe silence is provided by an incident at the battle of Uhud in which the Prophet having been injured in battle had fallen down in a cave, away from the eyes of the people.