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The birth of excellence begins with our awareness that our beliefs are a choice. We usually don't think of it that way, but belief can be a conscious choice. You can choose beliefs that limit you, or you can choose beliefs that support you. The trick is to choose the beliefs that are conducive to success and the results you want and to discard the ones that hold you back.

Tony Robbins (2008). “Unlimited Power: The New Science Of Personal Achievement”, p.57, Simon and Schuster
The birth of excellence begins with our awareness that our beliefs are a choice. We usually don't think of it that way, but belief can be a conscious choice. You can choose beliefs that limit you, or you can choose