The very rare HD footage above is of Helen Keller speaking and it is astonishing on several fronts. What strikes me most is the wisdom, perseverance and ingenuity of Keller's teacher Anne Sullivan. Helen Keller would become world famous for her political activism before her death, but Anne Sullivan has been almost forgotten by the American public. Behind every world changer is a mentor, and Helen Keller's teacher is one worth imitating. She once said, "Keep on beginning and failing. Each time you fail, start all over again, and you will grow stronger until you have accomplished a purpose - not the one you began with perhaps, but one you will be glad to remember."