Single Idea 12721

[catalogued under 12. Knowledge Sources / B. Perception / 2. Qualities in Perception / e. Primary/secondary critique]

Full Idea

Concerning bodies I can demonstrate that not merely light, heat, color, and similar qualities are apparent but also motion, figure, and extension.

Gist of Idea

Light, heat and colour are apparent qualities, and so are motion, figure and extension

Source

Gottfried Leibniz (De modo distinguendi phaenomena [1685], A6.4.1504), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 4

Book Reference

Garber,Daniel: 'Leibniz: Body, Substance, Monad' [OUP 2009], p.155


A Reaction

Leibniz is not consistent on this. Here he is flirting with idealism, but he often backs away from that. In Discourse §12 he makes secondary qualities certainly subjective, and primary qualities possibly so. He admits the primaries contain eternal truths.