Full Idea
By far the greatest proportion of our life takes place without this mirroring effect [of consciousness]; and this is true even of our thinking, feeling and willing life, however offensive this may sound to older philosophers.
Gist of Idea
Most of our lives, even the important parts, take place outside of consciousness
Source
Friedrich Nietzsche (The Gay (Joyful) Science [1882], §354)
A Reaction
Nietzsche didn't just hint at the possibility of a (Freudian) sub-conscious - he was whole-heartedly committed to it, and Freud gave him credit for it. I think philosophers are only just beginning to digest this crucial idea.
Book Reference
Nietzsche,Friedrich: 'The Gay Science', ed/tr. Kaufmann,Walter [Vintage 1974], p.297
Related Idea
Idea 20115 All of our normal mental life could be conducted without consciousness [Nietzsche]