Rudolf Hermann Lotze,
Outlines of Metaphysic — First Principal DivisionOntology
(1883)
“ We can therefore merely form the general notion of ‘quality’ in such a way as to lead us to seek further for the universal factor of all sensible qualities. Now since the classes of these qualities are altogether disparate,—warm and sweet, for example, having no common element in their content,—such universal factor lies solely in the form which our representation gives to them all. ”
