In spiritual practice, communication is extremely important. If we could not apply communication, there would be no spiritual practice at all. There would be no scriptures, there would be no teachings, there would be no gestures, there would be no guru, there would be no chela (disciple). All these relationships exist because of energy. Therefore, things function along with that. That energy is speech. Speech is a very powerful thing. It is the crescendo of energy that moves.
From "Secret Beyond Thoughts," in The Collected Works of Chögyam Trungpa, Volume Six, page 524.