The circle with a dot in the center is perhaps one of the simplest and most incredible of symbols. The circumpunct has been used for an incredibly long time. The symbol once was a representation of the sun, and as such as been the symbol to represent the Archangel Michael. The circumpunct is also the alchemical symbol for gold.
Perhaps the most profound meaning for the circle with a dot in it is that of God. I had a professor once who had asked the class to draw the best representation of God. There were some students who drew Christ, others an old man in a chair, and then there were some that drew the Hindu gods. In the end all he did was draw a circle on the board with a dot in the center.
“This is God, the circumpunct is perhaps the most perfect symbol to represent God. The circle,” His finger traced the circle on the board. “represents the all encompassing power and infinite limitlessness of God. While the dot,” He pointed to the center of the circle “Represents our place within God, we are part of God. The circumpunct represents the perfect union of the divine and the created. The dot can represent anything within the omnipotent divinity of God.” He walked around the room in a circle then stood in the center. “Or it can also represent the self. The circle can mean the body, or the conscious self, while the dot can represent our subconscious or super-conscious.”
The circumpunct is indeed profound with its meaning ranging from an explanation of deity, to an explanation of the self. These two points in addition to its ancient meaning of the sun earn the circumpunct the rank of most symbolic of all symbols.