Candida Phoenix Philosophica

1The major premise is your own proposition. The minor is proved not only by what has been said, but also by the fact that you have proved nothing, although the burden of proof always rests on the person making the assertion. First, you claim that light exists in fire, in the sun and stars, or in some other body. Second, you object that light is not a substance because it is neither corporeal nor incorporeal. Third, by way of explaining or clarifying your meaning, you say that light in its proper and natural sense is intended, and divide it into extraordinary and ordinary light, as your letter sets out at greater length. None of this proves anything, since proofs must be conclusive.