DOCS.
498,
499
DECEMBER-JANUARY
1914 373
relation
to
my
mother
is concerned, I cannot
say
that
she
is
wrong. My
mother
corresponds
only
with
me-there
is
nothing
to be said
against
that. But
if the
other
party
simply
declares then that
she
no
longer
wants to have
anything
to
do with her,
then,
in
my
opinion,
this too
is
totally justified.
If
one
is
not
bound
to
a
person,
then
it
is
best
to avoid
her
if
being
together
is
unpleasant.
I
don't
see
anything wrong
with
that. It
must be
pleasant
for
my
mother
to
have to
deal
only
with
me.
She
really
does
not lose
much with this
restriction. Interaction
with
the
family
would
bring
me
nothing
but
incessant
annoyance.
I
am
not
letting
Miza
meddle
in
my
private affairs,
but
I
don't
meddle
in
hers either.
I find Miza's
absence
very
pleasant.
As
you
see, I,
too,
get
pleasure
out
of
my
marriage!
You
are a
kind
creature if
you
can
still feel
something
for
your
former
husband.[3]
I
find it
a
piece
of
singular good
luck
that
such
a good being
is
so deeply
attached
to
me.
Now
I
no
longer belong to
the
"disinherited."
I
am
curious to know how
the
personal
aspect
of
the
apartment
hunting
turned
out.
At
any
rate, I
know
that
you
will
not
chalk
it
up against
me
if Miza
is
unkind
to
you.
Stick
to
me,
and
you
will not have
any
bad
experiences;
this
is
what
I
hope.
Kisses from
your
Albert
499. To
Michele
Besso
[Zurich,
after
1
January
1914][1]
Dear
Michele,
Here
is your
manuscript
bundle
at
last.[2]
It
would be
a
great
pity
if
you
did not
carry
the
thing
through to
the
end. I have discovered little since
then. But
I did
prove
rigorously
that the
gravitational
as
well
as
the inertial
mass
of
closed
systems
are
determined
by
the total
rest
energy
of
the
system, including
the
gravitational
energy.[3]
At the
moment I
am
struggling
with the
quantum problem,
but
not
exactly
with
great
hope
of
success.
Let there
be
an
"accentuation-factor"
(p
(scalar)
for
the
energy
tensor.
I
ask,
how must this tensor
T^v
be
constituted
so
that there
will exist
a
(p
such
that both
ëJTI.LV
~Jxv
=
0
and
s'Sf-°
are
satisfied for each
fi.-
Not without
a
certain
unease
do
I
see
the
Berlin
adventure
approaching.[4]
...
In
any
case,
you
must
look
us up
there
soon.
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