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.
To become a teacher of Love, we need only be willing to hear Love's Voice and no other. Our responsibility is to let fear and guilt be undone in us, so that this Voice is clear within us. The light of heaven stands behind the veil of unforgiveness that we have drawn between ourselves and others; a dhadow waiting for forgiveness to remove it at last. The light of God is then freed to shine through the heart and extend out into the world.