Full Idea
If it is said that whiteness begins to be through alteration, this does not hold, because whiteness is nothing other than this-being-white.
Gist of Idea
Whiteness isn't created in an alteration, because it is just this-being-white
Source
Nicole Oresme (On 'Generation and Corruption' [1349], I.2), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 19.3
Book Reference
Pasnau,Robert: 'Metaphysical Themes 1274-1671' [OUP 2011], p.411
A Reaction
This innocent-looking remark is dynamite, because it rejects the separability of qualities, which threatens the doctrine of Transubstantiation.