"There are many similar 'nodes'."
The vampire stared at the 'small lamp' on his fingertip and said softly, "Just like in the summer of 1981, if Sirius Black hadn't changed the secret keeper to Peter Pettigrew, then the Potters hiding in Godric's Hollow wouldn't have been killed by Tom, and there wouldn't have been a third Black Wizard war in Britannia nineteen years later, with so many wizards missing, dying, or suffering for a lifetime... At that time, the thought that flashed through Sirius' mind was a node of destiny."
"Insignificant, fragile, yet with a kind of monumental significance."
"Changing that thought in his mind would alter history. In an impending war, the most important thing for the dominant side is to reduce 'variables' and ensure that reality isn't completely changed due to the shifts in certain historical 'nodes.'"
"That's the meaning of 'nails.'"
