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… someone is said to be the same person from childhood till old age. Although he is called the same person, he never has the same constituents, but is always being renewed in some respects and experiencing loss in others, for instance, his hair, skin, bone, blood and his whole body. This applies not only to the the body but also to the mind: attributes, character traits, beliefs, desires, pleasures, pains, fears—none of these ever remain the same in each of us, but some are emerging while others are being lost.”

-Diotima in Plato’s Symposium