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Peak performance is dependent on passion, grit, determination, and a willingness to do something poorly until you can do it well.
Hilary Hinton "Zig" Ziglar (November 6 1926 – November 28 2012) was an American self-help author and speaker.
Biography information from Wikiquote · Portrait adapted from Wikimedia Commons, BrokenSphere (CC BY-SA)
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