People, he had said, were always being looked at as points, and they ought to be...

People, he had said, were always being looked at as points, and they ought to be looked at as lines. There weren't any points, it was false to assume that a person ever was anything. He was always becoming something, always changing, always continuous and moving, like the wiggly line on a machine used to measure earthquake shocks. He was always what he was in the beginning, but never quite exactly what he was; he moved along a line dictated by his heritage and his environment, but he was subject to every sort of variation within the narrow limits of his capabilities.
...
She shut her mind on that too. There was danger in looking at people as lines. The past spread backward and you saw things in perspective that you hadn't seen then, and that made the future ominous, more ominous than if you just looked at the point, at the moment. There might be truth in what Bruce said, but there was not much comfort.