" Here a new confusion makes its appearance: modern physi-
cists, in their efforts to reduce quality to quantity, have arrived by a
sort of ‘logic of error’ to the point of confusing the two, and thence
to the attribution of quality itself to their ‘matter’ as such; and they
end by assigning all reality to ‘matter’, or at least all that they are
capable of recognizing as reality: and it is this that constitutes ‘mate-
rialism’ properly so called. "

― René Guénon , The Reign of Quantity and the Signs of the Times