Beyond Good and Evil by Friedrich Nietzsche Chapter 1 Page 44

we are at the same time the commanding AND the obeying parties, and as the obeying party we know the sensations of constraint, impulsion, pressure, resistance, and motion, which usually commence immediately after the act of will; inasmuch as, on the other hand, we are accustomed to disregard this duality, and to deceive ourselves about it by means of the synthetic term “I”: a whole series of erroneous conclusions, and consequently of false judgments about the will itself, has become attached to the act of willing — to such a degree that he who wills believes firmly that willing SUFFICES for action. Since in the majority of cases there has only been exercise of will when the effect of the command — consequently obedience, and therefore action — was to be EXPECTED, the APPEARANCE has translated itself into the sentiment, as if