Fasting from words, fasting from a volume of speech, being willing to humbly accept the yoke of silence and quietude deprives the tongue of the mastery of our hearts and minds. The tongue is a very useful tool for the art of love and for the art of prayer, but it is also the means by which we afflict others and even our own selves so often. So it must be called into holy obedience.
For, to love another is to address to that person the most powerful and imperious form of appeal. It is to stir up in his or her depths a silent and hidden person forced to emerge in response to our voice, so new that even its owner did not know it, yet so true that he or she cannot fail to recognize it, even though seeing it for the first time.