230
THE ARCHITECTURE
OF
HUMANISM
the upward limit
ofspace-sensation instead
ofthe
actually
enclosingroof.
Nothing,therefore,
willservethe
architectbutthe
fullest power to imagine the
space-value resulting
fromthecomplex
conditionsofeach
particularcase
;
there arenoliberties which
he may not sometimes
take,andno
'
fixedratios
'
whichmay
notfailhim.
Architectureisnota
machinerybutanart; andthose
theories of architecture which
provide ready-made
testsforthe
creationorcriticismofdesignare
self-
condemned. None the less,
in the beautyofevery
building,space-value,addressingitselftooursenseof
movement,willplayaprincipal
part.
V
^livoidsarethe necessary
mediumofmovement,
solidsaretheessentialinstrumentofsupport; anda
dependence upon physical firmness and security
is
notlessfundamentaltoournaturethanthatinstinc-
tiveneed for expansion which gives value
to
archi-
tectural spaceXAny unlooked-for failure of resist-
ance intangibleobjectsdefeats thevitalconfidence
ofthebody
;
andifthis
werenotalreadyobvious,
the
pervasivephysicaldisquietwhichthemildesttremor
ofearthquakeissufficient
toexcite,mightshowhow
deeply organisedin ournature is ourrelianceupon
theelementary
stabilityofmass./jWeight, pressure
andresistance
arepartofourhabitualbodyexperi-