Full Idea
'Know thyself' does not mean instrospect your soul. It means see yourself as others would see you if they were intimate enough with you.
Gist of Idea
'Know yourself' is not introspection; it is grasping how others see you
Source
Charles Sanders Peirce (Reasoning and the Logic of Things [1898], V)
Book Reference
Peirce,Charles Sanders: 'Reasoning and the Logic of Things', ed/tr. Ketner,K.L. [Harvard 1992], p.186
A Reaction
When it comes to anger management, I would have thought that introspection had some use. You can see a tantrum coming before even your intimates can. Nice disagreement with Sartre! (Idea 7123)
Related Idea
Idea 7123 Knowing yourself requires an exterior viewpoint, which is necessarily false [Sartre]