"Obviously a lot has gone on, and I feel I am different person, I haven't had a beer since New Year's, which is pretty big for me."

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One reason that challenge brings happiness is that it allows you to expand your self - definition. You become larger. Suddenly you can do yoga or make homemade beer or speak a decent amount of Spanish. Research shows that the more elements make up your identity, the less threatening it is when any one element is threatened.

— Gretchen Rubin