208 THE ARCHITECTURE OFHUMANISM
tionsofthehumanbody,whichartists
like
Leonardo
(followingVitruvius)soughttodescribewithinacircle
and
a square, are
not most beautiful when
they
can be exactly related to those figures. It was
realised that
'
proportion
*
is a formofbeauty
: it
wasrealised that
'
proportion
'
is a
mode
ofmathe-
matics. Butit wasnot realised that thewordhas
adifferentbearinginthetwocases. Criticismis
not
called upon to invent an aesthetic for disembodied
minds,buttoexplainthepreferenceswhichwe(whose
minds are not disembodied) do actually possess.
Our
aesthetic taste is
partly physical
;
and, while
mathematical
'
proportion
'
belongs to the abstract
intellect, aesthetic
'
proportion
'
is a
preference in
bodilysensation.
Here,too,arelawsandratios,but
of adifferentgeometry.
And therecan benosure
criticism of architecture till we have
learnt the
geometryoftaste.
Mass, Space, Line,
and Coherence constitute, in
architecture,
the fourgreat provinces
of thatgeo-
metry. Whenithassatisfiedscience
with
'
firmness,'
andcommon use with
its commodity,
architecture,
becoming art, achieves,
through these
four means,
the
last
'
condition of well-building
'
—^its
'
delight.'
By thedirect agencyof
Massand Space,
Line and
Coherence upon our
physical
consciousness, archi-
tecture communicates its
value asan art.
These
arethe irreducible
elementsofits
aestheticmethod.