Full Idea
Thought must have the logical form of reality if it is to be thought at all.
Gist of Idea
All thought has the logical form of reality
Source
Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], A V.1)
Book Reference
Wittgenstein,Ludwig: 'Lectures in Cambridge 1930-32', ed/tr. Lee,Desmond [Blackwell 1980], p.10
A Reaction
This links nicely the idea that true thoughts somehow share the structure of what they refer to, with the idea of logical form in logic. But maybe logical form is a fiction we offer in order to obtain a spurious map of reality.