Nexus

At the point where the Beams cross, at the center of Roland’s world (and all worlds), stands the Dark Tower, the nexus of all where and when.

A nexus of passageways, like medieval battlements, entrenches the cramped grounds between one building and the next.

It is possible to understand that Napoleon had power and so events occurred; with some effort one may even conceive that Napoleon together with other influences was the cause of an event; but how a book, Le Contrat Social, had the effect of making Frenchmen begin to drown one another cannot be understood without an explanation of the causal nexus of this new force with the event.

And what he saw was a time nexus within this cave, a boiling of possibilities focused here, wherein the most minute action–the wink of an eye, a careless word, a misplaced grain of sand–moved a gigantic lever across the known universe.

But then, intelligence tests hadn't trapped an andy in years, not since the primordial, crude varieties of the '70s The Nexus-6 android types, Rick reflected, surpassed several classes of human specials in terms of intelligence.

Anyone can sense nexus points in the natural interruptions of life.