Cooper had no place in this future. His daughter told him to go. "No parent should have to watch their own child die," she said. "Go find Amelia."
She looked at him, a man frozen in time, her own father who was now younger than her grandchildren. She smiled, and pointed to the watch on her wrist. "I knew it was you." synopsis of interstellar
"Because no one else would be brave enough to walk into a stranger's hospital room." Cooper had no place in this future
We weren't meant to save our past. We were meant to become the ghosts of our own future. And the answer was never out there, among the stars. The answer was always back in that dusty bedroom, in the love between a father and his daughter—a force as real, and as mysterious, as gravity itself. "Go find Amelia
Now, with the Endurance crippled and fuel running out, they had one final chance: the last planet, Edmund’s. But to reach it, they would need to slingshot around Gargantua itself, a maneuver that would cost them years. Amelia suggested a radical idea: use the black hole’s gravity to their advantage. But Cooper had a different plan.
To save Murph, to give her the quantum data needed to solve gravity, he had to go into the black hole. He knew it was a one-way trip. He and TARS detached, sacrificing themselves, using a gravity assist to hurl Amelia toward Edmund’s planet. As Cooper fell into the abyss, he watched the universe compress into a single, brilliant smear of light. He expected death. He found a library.