freud

…

…super-ego. Thus the ego is not derived solely from the id, but other external forces in the form of the super-ego as the id and super-ego vie for power to represent the ego. The ego either accepts or represses erotic trends from the id, which developed during the primitive oral phase. Ultimately it is this fight between the id and the super-ego that determines what an individual acts upon, says, reacts, et cetera in consciousness.