“A weak character cannot carry the burden of protracted conflict in a play. He cannot support a play. We are forced, then, to discard such a character as a protagonist. There is no sport if there is no competition; there is no play if there is no conflict. Without counterpoint there is no harmony. The dramatist needs not only characters who are willing to put up a fight for their convictions. He needs characters who have the strength, the stamina, to carry this fight to its logical conclusion.
We may start with a weak man who gathers strength as he goes along; we may start with a strong man who weakens through conflict, but even as he weakens he must have the stamina to bear his humiliation.”
– Lajos Egri, The Art of Dramatic Writing