Plato's Forms

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…people may not realize it, they are searching for final causes, or Forms. It is easy to understand why and how the Forms are the ultimate objects of human striving. Since they are unchanging and pure, the Forms provide a type of satisfaction that is unavailable from any other source. Not only are we unable to completely possess them, which fires our desire, but also they endure, unlike lesser things that ultimately fall into nonbeing.