in living people, one is dealing with unknown and unknowable quantities.
 Aldous Huxley, Crome Yellow (1921). copy citation

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Author Aldous Huxley
Source Crome Yellow
Topic unknown quantity
Date 1921
Language English
Reference
Note
Weblink https://www.gutenberg.org/files/1999/1999-h/1999-h.htm

Context

“said Denis. “True,” Mr. Wimbush continued, “the little I know about your past is certainly reassuring. But I know nothing of your present, and neither you nor I know anything of your future. It’s appalling; in living people, one is dealing with unknown and unknowable quantities. One can only hope to find out anything about them by a long series of the most disagreeable and boring human contacts, involving a terrible expense of time. It’s the same with current events; how can I find out anything about them except by devoting years to the most exhausting first-hand study, involving once more an endless number of the most unpleasant contacts?” source