He [Robert A. Heinlein] always pictured himself a libertarian, which to my way of thinking means "I want the liberty to grow rich and you can have th… - Isaac Asimov

If the love of money is the root of all evil, the need of money is most certainly the root of all despair.

I am not impressed by ancestry, since if I could trace my origins to Judas Maccabeus or to King David, that would not add one inch to my stature, either physically, mentally or ethically. What's more, what about all my other ancestors? There must have been uncounted thousands of human beings in the century of King David, all of whom in some small way contributed to my production, and every one of them but King David might have been criminals and drunkards for all I know. (Nor was King David himself entirely unremarkable for his ethical standards.)

Esta es la Tierra. No el eterno hogar de la Humanidad, sino el punto de partida de una infinita aventura. Todo lo que has de hacer para conseguirlo es tomar tu decisión. Es solo tuya. Tú, yo y el contenido de esa cueva estaremos protegidos por un campo de fisio-tiempo contra el Cambio. Cooper y su mensaje desaparecerán. La Eternidad desaparecerá junto con la Realidad de mi Siglo, pero nosotros nos quedaremos para tener hijos y nietos, y la Humanidad permanecerá para llegar hasta las Estrellas.