Full Idea
As the word is normally used, it can't be said of me at all that I 'know' I am in pain; what is it supposed to mean - except perhaps that I am in pain?
Gist of Idea
To say that I 'know' I am in pain means nothing more than that I AM in pain
Source
Ludwig Wittgenstein (Philosophical Investigations [1952], §246)
Book Reference
Wittgenstein,Ludwig: 'Philosophical Investigations', ed/tr. Anscombe,E. [Blackwell 1972], p.89
A Reaction
This raises the question of whether self-consciousness implies self-knowledge, and suggests that it doesn't. All our normal talk of knowledge requires some sort of reliable justification of beliefs, and we can't drop that in the case of self-knowledge.