The circle in geometry is a simple closed shape, and it has been known to be perfect between all shapes in human history. Pythagoras called it the most excellent of creative forms, without beginning or end, without sides or edges. The circle symbolizes being closed in and boundaries. It represents cycles. The most well-known example of the circle is the wedding ring.
The circle has been related to culture and religions too. It is an unbroken line which has no beginning, no end, and no direction. Because of these attributes, The Circle represents completeness, which encompasses all space and Time. It has been associated with unity, eternity, wholeness, the origin of perfection, and the self.