The window was one of the most eye-catching elements in a room. It could bring a different atmosphere and feeling to the room. In novels, windows could also be a profound concept. Here are a few possible ideas: 1. Closed and open: A window can be a medium for communication between a closed room and the outside world, or it can be an open window for people to see the outside world. Through the window, the characters could feel different atmosphere and experiences, thus shaping their character and destiny. 2. Light and shadow: The window can provide natural light and shadow to make the room brighter and darker. This could affect the character's mood and emotions, as well as the character's actions and decisions. Dream and reality: The window can be the dividing line between a character's dream and reality. Through the window, one could see one's dreams and also come into contact with the cruel reality. This could affect the character's worldview and outlook on life, and it could also help them change their own destiny. Loneliness and companionship: The window can be a symbol of loneliness. People could see the outside world through the window, but they felt isolated from the world. This could affect the character's psychological state and interpersonal relationships, and it could also help them find companionship and a sense of belonging. 5. Freedom and Restraint: A window can be a symbol of a character's freedom. Through the window, people could feel the brilliance of freedom, but they also felt bound and restricted. This could affect the thoughts and actions of the characters, as well as their fate and growth.