“The universe has no circumference”
ibid.
Context: The universe has no circumference, for if it had a center and a circumference there would be some and some thing beyond the world, suppositions which are wholly lacking in truth. Since, therefore, it is impossible that the universe should be enclosed within a corporeal center and corporeal boundary, it is not within our power to understand the universe, whose center and circumference are God. And though the universe cannot be infinite, nevertheless it cannot be conceived as finite since there are no limits within which it could be confined.
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Nicholas of Cusa 49
German philosopher, theologian, jurist, and astronomer 1401–1464Related quotes
"The Corpus", from Anarchism Is Not Enough (London: Jonathan Cape, 1928)
“… each dot: the center of a circle without circumference …”
Source: Echoes from the Bottomless Well (1985), p. 2

“God is a circle whose center is everywhere and circumference nowhere.”
For a discussion of this quotation, which is uncertain in origin but was quoted long before Voltaire, see the following: http://symbio.trick.ca/HomeSashaOnePageBible[2016-05-29]
Misattributed

“Nature is an infinite sphere whose center is everywhere and whose circumference is nowhere.”

“God is an infinite circle whose center is everywhere and whose circumference is nowhere.”
ibid.

Source: "Quotes", Fearful Symmetry : A Study of William Blake (1947), p. 46

“Every man is the center of a circle, whose fatal circumference he can not pass.”
Eulogy on Benjamin Hill, United States Senate, Jan. 23, 1882.
The Spiral Dance: A Rebirth of the Ancient Religion of the Goddess (1979)
Context: This is the stillness behind motion, when time itself stops; the center is also the circumference of all. We are awake in the night. We turn the Wheel to bring the light. We call the sun from the womb of night. Blessed Be!

The Romance of Commerce (1918), A Representative Business of the Twentieth Century