She didn't say a word and that only made her message resonate more powerfully. Valedictorian Elizabeth Bonker recently delivered the commencement speech at Rollins College in Florida, urging her classmates to serve others and embrace the power of sharing. Bonker, who is affected by nonspeaking autism, hasn't spoken since she was 15 months old. But thanks to an accepting attitude from her peers and teachers and help from technology, she has overcome many challenges and graduated at the top of her class at the Orlando-area school. Bonker used text-to-speech software to deliver the commencement address " an honor for which she was chosen by her fellow valedictorians. "I have typed this speech with one finger with a communication partner holding a keyboard," she said. "I am one of the lucky few nonspeaking autistics who have been taught to type. That one critical intervention unlocked my mind from its silent cage, enabling me to communicate and to be educated like my hero Helen Keller." In her speech, Bonker also evoked another hero: Fred Rogers, the Florida college's most famous alumnus. Last year, the school unveiled a statue of the man widely known as Mister Rogers. And it has long embraced his lessons. "When he died, a handwritten note was found in his wallet," Bonker said. "It said, 'Life is for service.'" She urged her classmates to rip off a piece of paper from their program, write those words down, and tuck the message away in a safe place.