O' Sensei Morihei Ueshiba, often remarked:

'The only way I can really explain Aikido is by the means of the triangle, circle, and square'.

The triangle represents Ki and Ryu, the generation and flow of energy, and it symbolizes the various trinities of existence: Heaven, earth, and humankind; body, mind, and spirit; man, woman, and child; birth, maturity, and death; truth, goodness, and beauty. Technically, the triangle represents the stable triangular stance of Aikido, initiative, and entering.
The circle stands for the principle of Ju, flexibility and suppleness. A circle with a dot in the centre symbolizes perfect resolution, harmony of all powers, and continual revolution. Physically, circular movements are the key to blending with a partner, the source of unlimited techniques.
The square represents Kon, the diamond element: solid, stable, real, and well proportioned. The square is the basis of the total control necessary for the proper performance of Aikido techniques.

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