Abstract
When we talk about reforming the character we mean the process of converting a state already established into another that is contrary, or, more generally, to convert someone vicious into someone virtuous. By common trend it is affirmed that reformation is indeed a possible, based on the Categories 13a19-30, alternative, which became popular after William Bondeson and his article from 1974.1 However, the purpose of this paper is to explain how the character’s change would be according to the Nicomachean Ethics.