Full Idea
In philosophy we know already all that we want to know; philosophical analysis does not give us any new facts.
Gist of Idea
We already know what we want to know, and analysis gives us no new facts
Source
Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], B V.1)
Book Reference
Wittgenstein,Ludwig: 'Lectures in Cambridge 1930-32', ed/tr. Lee,Desmond [Blackwell 1980], p.35