This is a very interesting element to examine. I think that you can find much in way of the presence of circles in our daily life. I am going to presume that this is a type of application assignment, where you are to take the concept of circles and apply it to one's own world. If this is the case, consider the idea that our planet moves in a circle. The very state of being in the world in terms of rotation of the Earth is done in a circular manner, in that our planet revolves around the sun. The arrangement of planets in the solar system is in a circular or orbital pattern. If we were to continue to apply this, our worlds are defined, to a large extent, by the presence of the sun and the moon, two orbs that are circular in nature. If we wanted to examine the symbolic implication of the circle, the communities in which we live are circular, by nature. If a circle is seen as a "simple closed curve that divides the plane into two regions" of "internal and external," then our communities are circles. The communities in which we live, in which we are an active member, and the realms that we choose to define our identities with other people are circles, as they represent a clear delineation between "inside" and "outside." If we examine the concept of circles in a more literal point of view, our steering wheels in cars, the tires and wheels to move our cars, as well as the lenses on camera phones are all circles.