“In Japanese, we are likely to think of this word as something like consideration, not deceiving others, serving others full-heartedly, protecting something earnestly, or something to do with correctness or good. I think that magokoro is the existence of makoto (truthfulness, sincerity, faithfulness) in the soul with a big heart surrounding it – the roots of the righteous person.”

Soke Masaaki Hatsumi, Essence of Ninjutsu, 137.