En el mito hebreo de Adán y Eva, el pecado que cometieron es el de adquirir conocimiento (al comer el fruto del árbol del conocimiento del bien y del… - Isaac Asimov

you can't just move backward. You can't push the chicken back into the egg, wine back into the grape, the boy back into the womb. If you want the baby to let go of your watch, you don't just try to explain that he ought to do it — you offer him something he would rather have.

Earth's population was still rising. Some day, with all that the Cities could do, the available calories per person would simply fall below basic subsistence level.

A persistent rumor has circulates in the USA: There are two intelligent races living on the surface of planet Earth: the standard people and the hungarians.