A word the song repeats is not a word the song has settled. Pick one and watch it move: where it enters, what it means there, and what it has become by the time the song puts it down. Each thread is every real occurrence, counted from the word-by-word division of the text.
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A sūtra is a thread. The word for the teaching and the word for the string of a garland are the same word — and this is what it means in practice: not a chain of conclusions, but one strand running through, picking up a different bead each time it surfaces.