Final answer:
Sancho evolves from selfish motives to loyal affection toward Don Quixote, finding virtue in his idealistic quests, while their characters' contrast creates a functional partnership. The character Vincent is not part of the original Cervantes text so their views cannot be accurately represented. Don Quixote's idealistic desire to fix the world holds a satirical mirror to 17th-century Spain's societal changes.
Step-by-step explanation:
Sancho Panza and Vincent have distinctly different attitudes toward Don Quixote. Sancho, a peasant farmer, first joins the knight errant as his squire with a practical and selfish motive of gaining personal wealth and status. However, over time, Sancho develops affection and loyalty towards Don Quixote, recognizing the goodness and honour in his master's pursuits, even if they seem mad. Their characters complement each other: Don Quixote's idealism is balanced by Sancho's earthiness.
On the other hand, Vincent's attitude is not addressed in the original text of "Don Quixote" by Miguel de Cervantes, and therefore, rightfully, cannot be accurately described within this context, presuming that 'Vincent' is a typo or an error in the question.
Don Quixote wants to fix the world driven by his desire to revive the chivalric ideals that he reads about in his books. He believes that adhering to these values of knighthood will make the world a better place. This yearning reflects not just a personal inclination but also a satirical reflection of 17th-century Spain's societal shifts and the longing for past virtues during a time of change.