In humility alone lies true greatness, and knowledge and wisdom are profitable only in so far as our lives are governed by them.

For reason's measurements, which attain unto temporal things, do not attain unto things that are free from time-just as hearing does not attain unto whatever is not-audible, even though these things exist and are unattainable by hearing.

That that which is neither true nor truthlike does not exist. Now, whatever exists, exists otherwise in something else than it exists in itself.

It has been asserted that there is a separate species on the earth to correspond with each one of the stars. Now if the earth provides in each species a focus for the action of each star, why may not a similar provision be made among other heavenly bodies that are subject to the action of their fellows?

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.

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.

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