Full Idea
Many minds are housed within humans like creatures of the sea - they battle one another for the mind 'I'.
Gist of Idea
We contain many minds, which fight for the 'I' of the mind
Source
Friedrich Nietzsche (Unpublished Notebooks 1882-84 [1883], 4[207])
Book Reference
Nietzsche,Friedrich: 'Fragments from the period of 'Zarathustra' (v 14)', ed/tr. Loeb/Tinsley [Stanford 2019], p.148
A Reaction
I am happy to use the word 'I' for the sense of central control of focus and choice, but there doesn's seem to be an actual organ of the Self, so it is a fiction, but one which reflects the general picture of what happens. I can pick a drive to foster.