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If your desire is a 10 but your self-esteem is a 5, you'll never perform at the level of a 10. You'll perform as a 5 or lower. People are ever able to outperform their self-image.

John C. Maxwell (2012). “The 15 Invaluable Laws of Growth: Live Them and Reach Your Potential”, p.44, Hachette UK
If your desire is a 10 but your self-esteem is a 5, you'll never perform at the level of a 10. You'll perform as a 5 or lower. People are ever able to outperform their self-image.