“To become what one is, one must not have the faintest idea what one is.”
Friedrich Nietzsche book Ecce homo
Daß man wird, was man ist, setzt voraus, daß man nicht im entferntesten ahnt, was man ist.
"Why I am So Clever", 9.
Variant translations:
Becoming what you are presupposes that you have not the slightest inkling what you are.
Ecce Homo (1888)