“His absence will haunt their hallways, and he will be a space they can't fill. And then time will pass, and the hole will be gone, like when an organ is removed and the body's fluids flow into the space it leaves. Humans can't tolerate emptiness for long.”

“And marking off time struck me as something like counting empty spaces—spaces you know can't ever be filled.”

“Humans can't tolerate emptiness for long.”

“The world is only tolerable because of the empty places in it...when the world's filled up, we'll have to get hold of a star. Any star. Venus, or Mars. Get hold of it and leave it empty. Man needs an empty space somewhere for his spirit to rest in.”

“The human brain cannot encompass total absence. Like infinity, it is simply not something that the organ runs to. The space someone leaves must be filled, so we dream forever of those who are no longer here. Our minds make them live again.”

“She was gone, and all that was left was the space you'd grown around her, like a tree that grows around a fence. For a long time, it remained hollow. Years, maybe. And when at last it was filled again, you knew that the new love you felt for a woman would have been impossible without Alma. If it weren't for her, there would never have been an empty space, or the need to fill it.”