Silence
When one keeps silent, he is given time and freedom for prayer and
concentration; but when he passes his hours carelessly, he does not
have time to pray.
Furthermore, through his careless speech he accumulates various sins.
For this reason the Holy Fathers placed the virtue of silence at the
summit of the virtues, for without it no virtue is able to remain in the
soul of the man.
Elder Ephraim- Arizona