Full Idea
It is impossible to separate [affections/accidents], both in respect of quantity and of quality - of quantity, because there is no minimum magnitude, and of quality, because affections are inseparable.
Gist of Idea
The features of a thing (whether quality or quantity) are inseparable from their subjects
Source
Aristotle (Physics [c.337 BCE], 188a11)
Book Reference
Aristotle: 'The Basic Works of Aristotle', ed/tr. McKeon,Richard [Modern Library Classics 2001], p.226
A Reaction
This is an aspect of his famous view that universals, if there are such, are inherent in objects, and can't float free. It was important for scholastic philosophers, who need accidents to float free for the doctrine of Transubstantiation.