As long as Unity is preserved, the circular form must remain. Unity is formed by reason of the circling of forces around its center of gravity. The Circle is the form which energy assumes as it circles around its center of gravity. It is the figure of a whirl or spiral which forms the Universe. Thus it perfectly represents the first creative impulse the creation of a single form by a single idea, specific not general creation.
Creation is always through a spiral.
As energy operates upon substance through the spiral, it must at all times describe a Circle. The Circle has been used as a symbol of Deity because Deity is self-derived, not dependent on another, and has its center of gravity within itself. The beginning point of the Divine being is in itself, not in another. God is its own center of gravity. Divine energy must always flow in a circular form.