" What separates me most deeply from the metaphysicians is: I don’t concede that the ’I’ is what thinks. Instead, I take the ’I’ itself to be a construction of thinking, of the same rank as ‘matter’, ‘thing’, ‘substance’, ‘individual’, ‘purpose’, ‘number’; in other words to be only a regulative fiction with the help of which a kind of constancy and thus ‘knowability’ is inserted into, invented into, a world of becoming. Up to now belief in grammar, in the linguistic subject, object, in verbs has subjugated the metaphysicians: I teach the renunciation of this belief. It is only thinking that posits the ’I’: but up to now philosophers have believed, like the ‘common people’, that in ‘I think’ there lay something or other of unmediated certainty and that this ‘I’ was the given cause of thinking, in analogy with which we ‘understood’ all other causal relations. However habituated and indispensable this fiction may now be, that in no way disproves its having been invented: something can be a condition of life and nevertheless be false. "

― Friedrich Nietzsche