The entire plot of "The Miracle Worker" builds towards its climactic, revelatory moment. After weeks of relentless and physically taxing struggle, Anne Sullivan has managed to teach Helen Keller discipline and a vocabulary of memorized finger-spelled signs, but Helen has not yet made the crucial connection that these signs represent actual things. The family, celebrating Helen's return to the main house after two weeks of isolation with Anne in the garden house, immediately begins to undermine the discipline Anne has instilled, allowing Helen to revert to her old behaviors at the dinner table. In a moment of defiance, Helen deliberately spills a pitcher of water.
Furious that her work is being undone, Anne grabs Helen and the pitcher and drags her outside to the water pump, determined to make her refill it. As Anne forces Helen's hand under the gushing water, she instinctively spells "w-a-t-e-r" into Helen's other palm. Suddenly, Helen freezes. A look of astonishment crosses her face as she finally understands. The feeling of the water on her hand connects with the word spelled into her palm. This is the miracle. The abstract signs now have concrete meaning. Helen, overwhelmed with excitement, drops to the ground, patting it and demanding the word from Anne. She then rushes around the property, touching objects—the pump, the porch, her mother—eagerly demanding the name for each. The wall of darkness and silence has been shattered. In the final, poignant moments, Helen touches Anne and spells "teacher" into her hand. She then allows Anne to embrace her, and Anne, finally letting her own guard down, whispers "I love Helen" into her hair. The hidden meaning made clear is that the "miracle" was not just for Helen; it was also for Anne, who, by saving Helen from isolation, also saved herself from the ghosts of her past.