The Fading of a Sound

Strike a temple bell, ring a small ghaṇṭā, or chant Om once with a full breath. Listen as the sound moves outward, then begins to thin. Follow it as it grows softer, until you cannot quite tell whether the sound is still there or only your memory of it. Stay in that thinning. The place where sound dissolves into silence is the same place where the mind dissolves into its source.