Though the Ninja’s mind knows of fear and defeat, he carries a stillness of the heart, for his
destiny is not left to chance but by his own choice. The Ninja practitioner must be well
grounded in his own concept of reality because he is dealing freely with the concepts of
truth and falsehood, fluidly bending one into the other. To prevent becoming lost,
misguided, or swallowed up by his own deception, greed or awareness altering, the
practitioner must maintain Seishin or ‘complete’ purity of heart.
The Ninja practitioner carries the truth in his heart, though he may appear unconventionally different or in many psychological guises to others. His intentions remain resolute in his heart, though it may appear otherwise to some, yet others may have no idea what those commitments entail. Because he is totally honest with himself at all levels of introspection, he can venture in the realm of falsehood and untruth without defiling himself or his spirit. He can willingly plunge into the cold darkness, knowing full well that he has the power to create his own light from the brightness he carries in his heart.