230
THE ARCHITECTURE
OF
HUMANISM
the upward limit
ofspace-sensation insteadoftheactually
enclosingroof.Nothing,therefore,willservethearchitectbutthefullest power to imagine the
space-value resultingfromthecomplex
conditionsofeachparticularcase;there arenoliberties which
he may not sometimes
take,andno
'fixedratios'whichmay
notfailhim.Architectureisnota
machinerybutanart; andthosetheories of architecture which
provide ready-madetestsforthe
creationorcriticismofdesignareself-condemned. None the less,
in the beautyofeverybuilding,space-value,addressingitselftooursenseof
movement,willplayaprincipal
part.V^livoidsarethe necessarymediumofmovement,
solidsaretheessentialinstrumentofsupport; anda
dependence upon physical firmness and security
isnotlessfundamentaltoournaturethanthatinstinc-
tiveneed for expansion which gives value
to
archi-tectural spaceXAny unlooked-for failure of resist-
ance intangibleobjectsdefeats thevitalconfidence
ofthebody
;
andifthis
werenotalreadyobvious,thepervasivephysicaldisquietwhichthemildesttremor
ofearthquakeissufficient
toexcite,mightshowhow
deeply organisedin ournature is ourrelianceupon
theelementary
stabilityofmass./jWeight, pressureandresistance
arepartofourhabitualbodyexperi-