Tae Kwon Do is premised on balance. This balance is represented by the ancient symbol above. All of the artwork on this page comes from the website http://www.bluewavetaekwondo.com

That ancient symbol is part of the Korean flag – below. There is a good description of the symbolism of the Korean flag at http://www.barrel.net/korean-flag.php

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There are eight equal and opposite facets to the full concept. Each facet experienced through the Tae Guek forms.