We can not draw a circle without a central point. The Lord is the center, the source and the essence of our lives. Recognizing as the focal point in our lives, we take care of our daily tasks. This is the meaning of pradakshina.
In addition, each point on the circumference of a circle is equidistant from the center. It means that wherever we are, we are also close to the Lord. His grace comes to us without partiality.