Sentence:  Ultimately, all frequencies <WSD>unify</WSD> into an unmoving state of "zero frequency" or "vacuum". In other words, all seven sound vibrations or notes <WSD>unify</WSD> into "silence"; all thought frequencies (positive and negative) <WSD>unify</WSD> into no-thought <!-- [sic] not italicized --> or "no-mind"; and all seven colors of the rainbow <WSD>unify</WSD> into "pure space" that appears dark when it is invisible and as light when it is visible. 
Meaning of the word marked with <WSD> tags:  Become one.