“I remembered once, in Japan, having been to see the Gold Pavilion Temple in Kyoto and being mildly surprised at quite how well it had weathered the passage of time since it was first built in the fourteenth century. I was told it hadn’t weathered well at all, and had in fact been burnt to the ground twice in this century. “So it isn’t the original building?” I had asked my Japanese guide.“But yes, of course it is,” he insisted, rather surprised at my question.“But it’s burnt down?”“Yes.”“Twice.”“Many times.”“And rebuilt.”“Of course. It is an important and historic building.”“With completely new materials.”“But of course. It was burnt down.”“So how can it be the same building?”“It is always the same building.”I had to admit to myself that this was in fact a perfectly rational point of view, it merely started from an unexpected premise. The idea of the building, the intention of it, its design, are all immutable and are the essence of the building. The intention of the original builders is what survives. The wood of which the design is constructed decays and is replaced when necessary. To be overly concerned with the original materials, which are merely sentimental souvenirs of the past, is to fail to see the living building itself.”

“The available worlds looked pretty grim. They had little to offer him because he had little to offer them. He had been extremely chastened to realize that although he originally came from a world which had cars and computers and ballet and Armagnac, he didn't, by himself, know how any of it worked. He couldn't do it. Left to his own devices he couldn't build a toaster. He could just about make a sandwich and that was it.”

“Live or die: mere consequences of what you have built. What matters is building well. So here we are I've assigned myself a new obligation. I'm going to stop undoing deconstructing I'm going to start building... ... What matters is what you are doing when you die... ... I want to be building.”

“The first I knew about it was when a workman arrived at my home yesterday. I asked him if he'd come to clean the windows and he said no, he'd come to demolish the house. He didn't tell me straight away of course. Oh no. First he wiped a couple of windows and charged me a fiver. Then he told me.""But Mr. Dent, the plans have been available in the local planning office for the last nine months.""Oh yes, well, as soon as I heard I went straight round to see them, yesterday afternoon. You hadn't exactly gone out of your way to call attention to them, had you? I mean, like actually telling anybody or anything.""But the plans were on display...""On display? I eventually had to go down to the cellar to find them.""That's the display department.""With a flashlight.""Ah, well, the lights had probably gone.""So had the stairs.""But look, you found the notice didn't you?""Yes," said Arthur, "yes I did. It was on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of the Leopard.”

“He might as well have been telling me to build a damn rocketship. I had no idea what to do.”

“It is an important and popular fact that things are not always what they seem. For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much, the wheel, New York, wars and so on - whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man for precisely the same reasons…”

“One of the major problems encountered in time travel is not that of becoming your own father or mother. There is no problem in becoming your own father or mother that a broad-minded and well-adjusted family can't cope with. There is no problem with changing the course of history—the course of history does not change because it all fits together like a jigsaw. All the important changes have happened before the things they were supposed to change and it all sorts itself out in the end.The major problem is simply one of grammar, and the main work to consult in this matter is Dr. Dan Streetmentioner's Time Traveler's Handbook of 1001 Tense Formations. It will tell you, for instance, how to describe something that was about to happen to you in the past before you avoided it by time-jumping forward two days in order to avoid it. The event will be descibed differently according to whether you are talking about it from the standpoint of your own natural time, from a time in the further future, or a time in the further past and is futher complicated by the possibility of conducting conversations while you are actually traveling from one time to another with the intention of becoming your own mother or father.Most readers get as far as the Future Semiconditionally Modified Subinverted Plagal Past Subjunctive Intentional before giving up; and in fact in later aditions of the book all pages beyond this point have been left blank to save on printing costs.The Hitchhiker's Guide to the Galaxy skips lightly over this tangle of academic abstraction, pausing only to note that the term "Future Perfect" has been abandoned since it was discovered not to be.”