King Lear, William Shakespeare

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…art. The physical world that the eye can detect can accordingly hide its evils with physical attributes, and thus clear vision cannot result from the eye alone. Lear's downfall was a result of his failure to understand that appearance does not always represent reality. Gloucester avoided a similar demise by learning the relationship between appearance and reality. If Lear had learned to look with more than just his eyes, he might have avoided this tragedy.