As a child with Tourette syndrome, Brad Cohen was ridiculed, beaten, mocked, and shunned. Children, teachers, and even family members found it difficult to be around him. As a teen, he was viewed by many as purposefully misbehaving, even though he had little power over the twitches and noises he produced, especially under stress. Even today, Brad is sometimes ejected from movie theaters and restaurants.

But Brad Cohen's story is not one of self-pity. His unwavering determination and fiercely positive attitude conquered the difficulties he faced in school, in college, and while job...