When it focuses on something illuminated by truth and what is, it understands, knows, and apparently possesses understanding, but when it focuses on what is mixed with obscurity, on what comes to be and passes away, it opines and is dimmed, changes its opinions this way and that, and seems bereft of understanding. It does seem that way. So that what gives truth to the things known and the power to know to the knower is the form of the good. And though it is the cause of knowledge [e] and truth, it is also an object of knowledge. Both knowledge and truth are beautiful things, but the good is
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