The Muses are the inspirational goddesses of literature, science, and the arts in Greek mythology. They were considered the source of the knowledge embodied in the poetry, lyric songs, and myths that were related orally for centuries in these ancient cultures.
A circle is a simple closed shape. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves so that its distance from a given point is constant.
KEN, one’s range of knowledge or understanding.