Archetypal symbolism using a variety of geometric shapes is ancient, stretching back to the dawn of man's earliest artworks as seen in petroglyphs around the world. Our ancestors’ simple drawings on rocks and artefacts gave tangible form to the harmonious patterns of life and the intangible order uniting the Universe. They give 'form to the formless' and are abstract expressions of the science manifesting reality.
Ueshiba Morihei (founder of aikido):
Down the generations all cultures have used simple shapes such as these and they, like Zen artists, had the same profound understanding that the simple patterns shaping the Universe were themselves sacred and empowered. Other examples, used extensively in my books, are yantras and mandalas. Tantra Yoga is the path of union with the Absolute through geometric visualization in Tantric Hindu and Buddhist traditions. Central to Tantrism are elaborate and precise geometric patterns, known as mandalas or yantras, some of which are thousands of years old. In this tradition the triangle, circle and square were significant Vedic forms which symbolised spirituality, evolution and the Earth respectively. Additionally in both Indian and Japanese esoteric teachings, such as Mikkyo, these shapes represent earth (square), water (circle) and fire (triangle).
Simple shapes embodying intricate complexity, the circle, square and triangle structure and bind the 3 profound concepts of time (evolution: Mind, serenity and perfection:water), space (Earth:Body:earth) and being (spirituality:solidity and applied control:fire). The empty circle, the vessel for all geometry shapes, when totally empty is the essence of enlightenment.
Here is my version of these timeless concepts: