What I am essentially--behind the involuntary masks of poet, logical reasoner and so forth--is a dramatist. My spontaneous tendency to depersonalization, which I mentioned in my last letter to explain the existence of my heteronyms, naturally leads to this definition. And so I do not evolve, I simply JOURNEY. (...) I continuously change personality, I keep enlarging (and here there is a kind of evolution) my capacity to create new characters, new forms of pretending that I understand the world or, more accurately, that the world can be understood.
from a letter of Pessoa dated 20 January 1935 (A Little Larger Than the Entire Universe)