Toward the end of the film, Klaatu is pursued by the American military and orders Helen Benson to memorize the phrase, saying There's no limit to what he (Gort) can do.
Toward the end of the film, Klaatu is pursued by the military with orders that he be taken dead or alive. He tells Helen Benson his concern about Gort and requests she memorize the phrase, saying There's no limit to what he can do.