Cooper's dream

Cooper’s dream in "Interstellar" represents his subconscious attempt to connect with his daughter Murph across time and space. In the dream, he is inside a tesseract—a higher-dimensional space—that allows him to see and influence different moments in her childhood bedroom. This reveals that his past efforts to communicate through gravity were actually him, from the future, trying to send essential data back to her to solve Earth's crises. The dream symbolizes his hope, love, and the intricate way love and time can be interconnected beyond conventional understanding.