Megacosm

Yes, the untapped power that lies within you. Now, child, it's time you awakened that power and realized your full potential.
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Gawrsh, aren't we here because of the picture?
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Tenchijin (天地人, lit. "Heaven, Earth, and Man") is one of Lexaeus's weapons in Kingdom Hearts 358/2 Days.

The trinity of "Heaven, Earth, and Man" is an important tenet of Confucianism, and appears in many places in Chinese and Japanese philosophy. They are considered the most important aspects of a battle, and Japanese Ikebana arranges flowers in a triangular pattern to symbolize these three tenets as well.