366
DOCS.
370,
371
AUGUST
1917
370. To
Willem
de
Sitter
[Lucerne,] Wednesday.
[8
August
1917]
Dear
Colleague,
I
am delighted
with
your
detailed and clear
arguments,
which
I
fully
under-
stand.
A
bridge can
be constructed
between
cases
A
and
B
as
follows:[1]
B
is
the
guv-field
of
a
world in which all matter
is
concentrated
at
the
“equator,”[2]
whereas it
is
uniformly
distributed
in
case
A.[3]
With this
view,
matter must
be considered the
cause
of
the
falling
off
of
g44
(to
zero)
upon
approaching
r
=
n/2R,
just
as
it
is
for
a
drop
in
the
g44’s
upon
approaching
the
Sun,
for
ex.[4]
The
inequivalence
of
the
different
space
points,
in
this
interpretation, is
not
an
“independent” property
of
the
space.
I
am
of
the
opinion
that
it
is
reasonable
to
demand
that
in
the
finite realm
(in
natural
measure),
singular
values for
guv
do not
occur as
long
as
the
energy density
is
finite
everywhere.[5]
With
cordial
regards,
I
am
yours,
A.
Einstein.
371. To
Michele
Besso
[Lucerne,]
Wednesday.
[15
August
1917]
Dear
Michele,
Many
thanks
for
the letter
and
the
explanations.
It’s
good
that
you
have
obtained the
information.
Ultimately,
they will just
have
to
make
the best of
it
in
Zurich.[1]
Are
they
living
at
home
again?[2]
The
pain
went
away
again soon
after
we
parted,
so
that
by evening already
there
were no
signs
of it
left.[3]
I
am
coming
around the
25th
(at
the
earliest,
in the
evening
of
the
24th).
Let’s discuss
your suggestions
then. Reason
versus
passion!
The
latter
always
wins whenever
they
are
pitted
against
each other
(proof
is
the
experience everyone
has
already
made for
himself).
So I
believe
that the
whole
thing
can
merely
lead to
a
pretty
little debate
between
us.
Best
regards
to
all
three
of
you, yours,
Albert.
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