Full Idea
One might almost believe that half our thinking takes place unconsciously.. Usually we arrive at a conclusion without having clearly thought about the premises which lead to it.
Gist of Idea
Half our thinking is unconscious, and we reach conclusions while unaware of premises
Source
Arthur Schopenhauer (Parerga and Paralipomena [1851], III:40)
Book Reference
Schopenhauer,Arthur: 'Essays and Aphorisms [from Pand P]', ed/tr. Hollingdale,R.J. [Penguin 1970], p.123
A Reaction
Schopenhauer was a major pioneer of this crucial idea. I'm beginning to think it is much greater than a half.