Terry's mother is telling her that silence is more powerful and more meaningful than words. She learned how words can twist and distort reality, how they are in the end, incapable of conveying the profundity of life, of Being. This is a powerful lesson, one that she wouldn't have been able to convey with language to her daughter (if for example Terry had asked her about them while she was still alive). Terry would have to discover it on her own. That's the beautiful message of her journals, of her life.
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