When one has begun to write, the hardest thing is to be sincere. Essential to mull over that idea and to define artistic sincerity. Meanwhile, I hit upon this: the word must never precede the idea. Or else: the word must always be necessitated by the idea. It must be irresistible and inevitable; and the same is true of the sentence, of the whole work of art. And for the artist's whole life, for his vocation must be irresistible.