Just as all motion is from an unmovable cause, so everything divisible is from an indivisible cause. However, this visible, corporeal world is, assuredly, of a divisible nature, since what is corporeal is divisible. Therefore, this world is from an earlier, indivisible Cause.

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

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.

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.

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

For all the [body's] members seek nothing except inseparable union with the intellect, as with their beginning, ultimate good, and everlasting life.

The intellect alone has an eye for viewing an essence, which it cannot see except in the true Cause, which is the Fount of all desire. Moreover, since all things seek to exist, then in all things there is desire from the Fount-of-desire, wherein being and desire coincide in the Same.