Our son Micah was two years old when we learned he was profoundly deaf. I remember him wading in the Florida Gulf waters up to his chest, and it suddenly occurred to me that he didn’t know his name. In his fist, he held a handful of pebbles, and he launched the rocks in flight. I watched as the pebbles glistened, tiny sparks of light, and realized if I called his name, if I screamed, the word …