252THE ARCHITECTURE
OF HUMANISM
in effect, thetreatise
of Aristotleremains, of alleffortsinaestheticcriticism, themostpenetrating
initsinsight, themostwiseinitsmethodofapproach.At once concrete and philosophical, itdoes
notconfusethehistoryofartwith itsessence, butseesthese intheirduerelation
;and, fromthisstudyofthe drama, written in the fourth century B.C., thecritic,evenof architecture,mightstillderiveaperti-nent guidance forhisthought. Butthetreatise ofAristotleis isolated, and
itis fragmentary: anditsuffersinevitablyfromtheprimitivecharacterofitspsychology. And at no time since the Greek did
these favourableconditions
recur; artand
thoughtpursued their separate paths, the former becomingless delicatelyself-sensitive, the latter less impar-tially curious, and both,gradually, as the closely-knitlifeoftheancientstategaveplacetothelooserwebof the modern,strayed,more and more,into amutuallyexclusiveisolation.Thus,between artandman's
thoughtaboutit,agulf widened,which neitherrequired,norwas able,
tobebridged.IIItisonlyinourown time
thatthe need topene-tratethis
problemhasarisen
;andwiththeneedthemeans.Art, as we have said, by
its own activity
can
create its canons and
traditions. If, by the