The book which the reader has before him at this moment is, from one end to the other, in its entirety and details ... a progress from evil to good, from injustice to justice, from falsehood to truth, from night to day, from appetite to conscience, from corruption to life; from bestiality to duty, from hell to heaven, from nothingness to God. The starting point: matter, destination: the soul. The hydra at the beginning, the angel at the end.