In creating the world, God used arithmetic, geometry, and likewise astronomy.

An external thing that is knowable [is knowable] by means of something internal that is consubstantial [with the rational soul].

Number, in consequence, includes all things that are capable of comparison. It is not then in quantity only that number produces proportion; it produces it in all things that are capable of agreement and differences in any way at all, whether substantially or accidentally.

A given circle cannot be so true that a truer one cannot be found; and the movement of a sphere at one moment is never precisely equal to its movement at another, nor does it ever describe two circles similar and equal, even if from appearances the opposite may seem true.

There are not many beginnings but there is a single Beginning, prior to multitude. But if you were to say that the beginnings are plural apart from their partaking of the One, that statement would self-destruct. For, surely, these plural beginnings would be both alike, by virtue of their not partaking of the One, and not alike, by virtue of their not partaking of the One.

Nor is the darkness of colour a proof of the earth's baseness; for the brightness of the sun, which is visible to us, would not be perceived by anyone who might be in the sun.

Thou art merciful; when all my endeavour is turned toward Thee because all Thy endeavour is turned toward me; when I look unto Thee alone with all my attention, nor ever turn aside the eyes of my mind, because Thou dost enfold me with Thy constant regard; when I direct my love toward Thee alone because Thou, who art Love's self, hast turned Thee toward me alone. And what, Lord, is my life, save that embrace wherein Thy delightsome sweetness doth so lovingly enfold me?