She looked quickly up. And then her eyes once more went back to the flashing thing she was holding in her hands. He saw that it was the pyramid of sp… - Clifford D. Simak

Even if the barrier now should disappear and the Flowers withdraw their attention from our Earth, we still would have been shaken from the comfortable little rut which assumed that life as we know it was the only kind of life and that our road of knowledge was the only one that was broad and straight and paved.
There had been ogres in the past, by finally the ogres had been banished. The trolls and ghouls and imps and all the others of the tribe had been pushed out of our lives, for they could survive only on the misty shores of ignorance and in the land of superstition. Now, I thought, we’d know an ignorance again (but a different kind of ignorance) and superstition, too, for superstition fed upon the lack of knowledge. With this hint of another world—even if its denizens should decide not to flaunt themselves, even if we should find a way to stop them—the trolls and ghouls and goblins would be back with us again. There’d be chimney corner gossip of this other place and a frantic, desperate search to rationalize the implied horror of its vast and unknown reaches, and out of this very search would rise a horror greater than any the other world could hold. We’d be afraid, as we had been before, of the darkness that lay beyond the little circle of our campfire.

Pues esto no es nada risible. Se trata sólo de un arco y una flecha, pero no es risible. Pudo haberlo sido en otro tiempo, pero la historia destruyó la comicidad de muchas cosas. Si el arco es un chiste, también lo es entonces la bomba atómica y lo mismo el polvo pestífero que barrió ciudades enteras, y lo mismo el cohete sibilante que se eleva y cae a quince mil kilómetros de distancia matando a un millón de personas.

There was no time, Hezekiah had said. No such thing as time in the terms of normal human thought. Time was bracketed and each of its brackets contained a single phase of a universe so vastly beyond human comprehension that it brought a man up short against the impossibility of envisioning it.
And time itself? Time was a never-ending medium that stretched into the future and the past — except there was no future and no past, but an infinite number of brackets, extending either way, each bracket enclosing its single phase of the Universe. Back on Man's original Earth, there had been speculation on travelling in time, of going back into yesterday or forward into tomorrow. And now he knew that you could not do it, that the same instant of time remained forever within each bracket, that Man's Earth had ridden the same bubble of the single instant from the time of its genesis and that it would die and come to nothing within that self-same instant. You could travel in time, of course, but there would be no yesterday and no tomorrow. But if you held a certain time sense you could break from one bracket to another, and when you did you would not find yesterday or tomorrow, but another world.