Circle
The circle is an ancient symbol which, being formed by an unbroken line that has no beginning, no end, and no direction, frequently represents a unity that encompasses all space and Time.
H. P. Blavatsky defined it as follows:
The one circle is divine Unity, from which all proceeds, whither all returns. Its circumference—a forcibly limited symbol, in view of the limitation of the human mind—indicates the abstract, ever incognisable PRESENCE, and its plane, the Universal Soul, although the two are one.[1]
The first and only form of the prima materia our brain-consciousness can cognise, is a circle. Train your thought first of all to a thorough acquaintance with a limited circle, and expand it gradually. You will soon come to a point when without its ceasing to be a circle in thought, it yet becomes infinite and limitless even to the inner perceptions. It is this circle which we call Brahmâ, the germ, atom or anu: a latent atom embracing infinitude and boundless Eternity during Pralaya, an active one during the life-cycles; but one which has neither circumference nor plane, only limitless expansion. Therefore the Circle is the first geometrical figure and symbol in the subjective world, and it becomes a Triangle in the objective.[2]