Another critic, Americo Castro, points out that _Lazarillo of Tormes_ is different from other types of sixteenth century prose fiction in at least one extremely important way that points toward the modern novel. The knights of chivalresque novels and the shepherds who sighed and lamented their way through pastoral novels were flat characters with no room to grow. Not so Lazarillo. Every action, every twist of fortune makes an impression on him, forms his way of looking at the world and shapes his nature. From an innocent little boy he becomes a mischievous, then vengeful, blind man's boy. He observes the hypocrisy, avarice, false pride, materialism of his masters, and when he marries the archpriest's mistress for what he can gain, he applies all the lessons he has learned on the ladder to success-- to the "height of all good fortune." Americo Castro also notes that _Lazarillo of Tormes_ is a step toward the masterpiece of Cervantes, _Don Quixote of La Mancha_. As this critic said: "In addition to its intrinsic merits, the _Lazarillo de Tormes_ is supremely important viewed in its historic perspective. In many ways it made possible the _Quijote_. Among other things, it offered in the intimate opposition of the squire and his servant the first outline of the duality-unity of Don Quijote and Sancho." Style is another point of great importance to this novel, particularly in the use of conceits. Lazarillo's father, for example, "suffered persecution for righteousness' sake," a clear reference to the beatitudes. But in this case "righteousness" is the law who is punishing him for being the thief that he is. Throughout the novel we see similar plays on words: the master, who "although he was _blind, enlightened_ me;" or the squire who tried to coax certain young ladies one morning, and whose stomach was _warm_, but when he discovered that his pocketbook was _cold_, he suffered _hot-chills_. It is not surprising that sequels promptly appeared, but the writers of these unfortunately lacked the genius of the author of the original _Lazarillo_. An anonymous sequel appeared in 1555 with the title, _The Second Part of Lazarillo of Tormes, His Fortunes and Misfortunes_. Its beginning words are the same as the final ones of the first _Lazarillo_, but there any similarity ends. In this novel Lazaro makes friends with some Germans and his wife gives birth to a daughter. Lazaro then enlists to go on an expedition to fight the Turks, his ship sinks, and he is miraculously changed into a fish. He has many adventures in the sea, and is finally caught up in the nets of some fishermen and changes back into a man. The novel is a fantasy, and may be allegorical. The beginning is its most realistic point, and the first chapter of this novel became tacked onto the end of the first _Lazarillo_.