Quote
"As the small pebble stirs the peaceful lake; The centre movd, a circle straight succeeds, Another still, and still another spreads."
"Circularity is a powerful concept, the idea of a closed loop even more so. In circular motion there is magic, just as there is in electro-magnetism. But it only manifests itself when it is, like (shall we say for the moment, rather than a reflection of) its neighboring head, truly three-dimensional. ...We can induce current into the one [coil] from the other by means totally unintelligible to us, but to which we give the name . But if I place one coil with its axis at right-angles to that of the other, there is no induced voltage. It is as if the two circuits lived in different worlds... What is the meaning of perspective in a four-dimensional space?"

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius. The length of a line segment connecting two points on the circle and passing through the centre is called the diameter. A circle bounds a region of the plane called a disc.
"As the small pebble stirs the peaceful lake; The centre movd, a circle straight succeeds, Another still, and still another spreads."
"Everything the Power of the World does is done in a circle. The sky is round, and I have heard that the earth is round like a ball, and so are all the stars. The wind, in its greatest power whirls. Birds make their nest in circles, for theirs is the same religion as ours. The sun comes forth and goes down again in a circle. The moon does the same and both are round. Even the seasons form a great circle in their changing, and always come back again to where they were. The life of a man is a circle from childhood to childhood, and so it is in everything where power moves. Our tepees were round like the nests of birds, and these were always set in a circle, the nations hoop."
"Circles and right lines limit and close all bodies, and the mortal right-lined circle must conclude and shut up all."
"Never, never rest contented with any circle of ideas, but always be certain that a wider one is still possible."
"There must be a positive and negative in everything in the universe in order to complete a circuit or circle, without which there would be no activity, no motion."
"And the seasons they go round and round, And the painted ponies go up and down, Were all captive on the carousel of time We cant return we can only look behind From where we came And go round and round and round In the circle game."