The Dark Knight Rises is one of my favourite movies. It’s about Batman. Spoiler Alerts ahead for the 2012 movie.
The scary, powerful bad guy in the movie is called Bane. Batman fights Bane in a brawl but Bane defeats him, dealing a crippling blow to his back. Batman is then taken abroad to an underground prison where escape is almost impossible. The inmates tell Wayne the story of a child, who was born and raised in the prison — the only prisoner to have done so.
When Batman heals a bit, works out, and feels stronger he decides to escape. He gets a long rope to use in his attempt to escape. He fails in the attempt and falls – again and again. Each injury hurts some more and makes the next escape attempt that much more difficult.
After trying and failing enough times, he finally asks his fellow prisoners how the child escaped.
They answer: "The child didn’t take the rope along."
Batman realizes his fatal folly. In keeping a rope to safely climb out, he was still clinging to the pit. He was still playing it safe. He was still hedging his bets. He wasn’t fully committed to the escape from the pit.
The moment he understands this, he leaves the rope behind. He gets out of the pit in this attempt, because he had to. Success is the only option now because the alternative is a painful death.