Full Idea
Everyday language is a part of the human organism and is no less complicated than it. It is not humanly possible to gather immediately from it what the logic of language is.
Gist of Idea
Our language is an aspect of biology, and so its inner logic is opaque
Source
Ludwig Wittgenstein (Tractatus Logico-Philosophicus [1921], 4.002)
Book Reference
Wittgenstein,Ludwig: 'Tractatus Logico-Philosophicus (Pears)', ed/tr. Pears,D. /McGuinness,B. [RKP 1961], p.19
A Reaction
It is normally assumed that ordinary language philosophy was derived from the later Wittgenstein, but this para in the Tractatus seems to contain the germ of the idea. He is pessimistic about finding logical forms.