The quote “It is easier to behave nicely when your good clothes are on,” by Rilla Blythe in L.M. Montgomery's book "Rilla of Ingleside," conveys an idea about the influence of one's appearance on behavior. It suggests that dressing well elevates one’s demeanor, promoting feelings of confidence and propriety. When individuals present themselves in a polished manner, they might feel a stronger inclination to act with kindness and decorum.

This notion reflects the broader theme of social expectations and how external factors, such as clothing, can significantly impact personal behavior. It highlights the connection between outward presentation and inner attitude, implying that good attire might inspire individuals to uphold higher standards of conduct, fostering a more positive interaction with others.