His ignorance was as remarkable as his knowledge.
Of contemporary literature, philosophy and politics he appeared
to know next to nothing. Upon my quoting Thomas Carlyle,
he inquired in the naivest way who he might be and what he had
done. My surprise reached a climax, however, when I found
incidentally that he was ignorant of the Copernican Theory
and of the composition of the Solar System. That any
civilized human being in this nineteenth century should not
be aware that the earth travelled round the sun appeared to
be to me such an extraordinary fact that I could hardly
realize it.

"You appear to be astonished," he said, smiling at my
expression of surprise. "Now that I do know it I shall do my
best to forget it."

"To forget it!"

"You see," he explained, "I consider that a man's brain
originally is like a little empty attic, and you have to
stock it with such furniture as you choose. A fool takes in
all the lumber of every sort that he comes across, so that
the knowledge which might be useful to him gets crowded out,
or at best is jumbled up with a lot of other things so that
he has a difficulty in laying his hands upon it. Now the
skilful workman is very careful indeed as to what he takes
into his brain-attic. He will have nothing but the tools
which may help him in doing his work, but of these he has
a large assortment, and all in the most perfect order.
It is a mistake to think that that little room has elastic