Perhaps the most difficult thing about building a character is getting a glimpse, beforehand, of the inner consistency that will have to be manifested in action. Often, this glimpse only comes when the character starts to move. Even so, practice shows that it is neither a simple nor a safe task when one intends to represent a convincing model, since to do so is to conceive unity through contradictions. In this sense, the work is similar to that of a biographer, although most of the time the latter can rely on concrete material to get started.