"Everything the Power of the World does is done in a circle. The sky is round, and I have heard that the earth is roun…"

"Circles and right lines limit and close all bodies, and the mortal right-lined circle must conclude and shut up all."

"Maths is really hard to define. ...Except I like to define maths as this{{center|1=\frac{\pi}{4} = 1 - \frac{1}{3} + …"

"If people stand in a circle long enough, they'll eventually begin to dance."

"All my life's a circle; But I can't tell you why; Season's spinning round again; The years keep rollin' by."

"A circle may be small, yet it may be as mathematically beautiful and perfect as a large one."

"Our task must be to free ourselves... by widening our circle of compassion to embrace all living creatures and the wh…"

"The eye is the first circle; the horizon which it forms is the second; and throughout nature this primary figure is r…"

"Never, never rest contented with any circle of ideas, but always be certain that a wider one is still possible."

"Do not disturb my circles!"