Understanding (n.) is God dictating to us — not through words, but in a way far more excellent, as anyone who has known intellectual certainty can attest.
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Understanding (n.) is perceiving something with the mind alone, without words or symbols.
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Understanding (n.) is the mind's way of staying alive: its effort to persist is nothing but the effort to understand.
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Understanding (n.) is most distinct in the mind whose body acts most by itself, with the fewest other bodies joining in.
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Understanding (n.) feeds its own appetite: the more the mind can know things intuitively, the more it wants to.