The founder of Aikido, Morihei Ueshiba, used the symbols of the triangle, circle, and square (△ ○ □) to convey key philosophical concepts central to Aikido. These symbols represent the Sangen 三元 in the Shinto concept of Ichirei Shikon Sangen Hachiriki 一霊四魂三元八力, a framework used to explain the nature of the universe. While a detailed explanation of this concept is beyond the scope of this article, its basic understanding is as follows: Ichirei is the One Spirit, the single source of creation that forms all existence. Shikon refers to the four souls 奇霊, 荒霊, 和霊, 幸霊, which represent Wisdom 智, Bravery 勇, Intimate/Close 親 and Love 愛. Hachiriki refers to…