The wild goose is a Celtic symbol of the Holy Spirit. Geese in a flock have greater range and fly faster than single geese as they benefit from the lift of their wings. When the lead goose gets tired, it rotates back into formation and another flies at the point position. We fly in sacred community, interdependent with one another.
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.