the critique of pure reason-第47章

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the　intensive　quantity　thereof；　namely；　that　they　have　a　degree。　All

else　is　left　to　experience。



　　　　　　　　　　　　　　　　　　3。　ANALOGIES　OF　EXPERIENCE。



　　　　The　principle　of　these　is：　Experience　is　possible　only

　　　　　through　the　representation　of　a　necessary　connection

　　　　　　　　　　　　　　　　　　　　　　of　Perceptions。



　　　　　　　　　　　　　　　　　　　　　　　　　　　PROOF。



　　Experience　is　an　empirical　cognition；　that　is　to　say；　a　cognition

which　determines　an　object　by　means　of　perceptions。　It　is　therefore

a　synthesis　of　perceptions；　a　synthesis　which　is　not　itself

contained　in　perception；　but　which　contains　the　synthetical　unity　of

the　manifold　of　perception　in　a　consciousness；　and　this　unity

constitutes　the　essential　of　our　cognition　of　objects　of　the　senses；

that　is；　of　experience　（not　merely　of　intuition　or　sensation）。　Now

in　experience　our　perceptions　come　together　contingently；　so　that　no

character　of　necessity　in　their　connection　appears；　or　can　appear　from

the　perceptions　themselves；　because　apprehension　is　only　a　placing

together　of　the　manifold　of　empirical　intuition；　and　no　representation

of　a　necessity　in　the　connected　existence　of　the　phenomena　which

apprehension　brings　together；　is　to　be　discovered　therein。　But　as

experience　is　a　cognition　of　objects　by　means　of　perceptions；　it

follows　that　the　relation　of　the　existence　of　the　existence　of　the

manifold　must　be　represented　in　experience　not　as　it　is　put　together

in　time；　but　as　it　is　objectively　in　time。　And　as　time　itself　cannot

be　perceived；　the　determination　of　the　existence　of　objects　in　time

can　only　take　place　by　means　of　their　connection　in　time　in　general；

consequently　only　by　means　of　a　priori　connecting　conceptions。　Now

as　these　conceptions　always　possess　the　character　of　necessity；

experience　is　possible　only　by　means　of　a　representation　of　the

necessary　connection　of　perception。

　　The　three　modi　of　time　are　permanence；　succession；　and

coexistence。　Accordingly；　there　are　three　rules　of　all　relations　of

time　in　phenomena；　according　to　which　the　existence　of　every

phenomenon　is　determined　in　respect　of　the　unity　of　all　time；　and

these　antecede　all　experience　and　render　it　possible。

　　The　general　principle　of　all　three　analogies　rests　on　the

necessary　unity　of　apperception　in　relation　to　all　possible

empirical　consciousness　（perception）　at　every　time；　consequently；　as

this　unity　lies　a　priori　at　the　foundation　of　all　mental　operations；

the　principle　rests　on　the　synthetical　unity　of　all　phenomena

according　to　their　relation　in　time。　For　the　original　apperception

relates　to　our　internal　sense　（the　complex　of　all　representations）；

and　indeed　relates　a　priori　to　its　form；　that　is　to　say；　the

relation　of　the　manifold　empirical　consciousness　in　time。　Now　this

manifold　must　be　combined　in　original　apperception　according　to

relations　of　time…　a　necessity　imposed　by　the　a　priori

transcendental　unity　of　apperception；　to　which　is　subjected　all　that

can　belong　to　my　（i。e。；　my　own）　cognition；　and　therefore　all　that

can　become　an　object　for　me。　This　synthetical　and　a　priori

determined　unity　in　relation　of　perceptions　in　time　is　therefore　the

rule：　〃All　empirical　determinations　of　time　must　be　subject　to　rules

of　the　general　determination　of　time〃；　and　the　analogies　of

experience；　of　which　we　are　now　about　to　treat；　must　be　rules　of

this　nature。

　　These　principles　have　this　peculiarity；　that　they　do　not　concern

phenomena；　and　the　synthesis　of　the　empirical　intuition　thereof；　but

merely　the　existence　of　phenomena　and　their　relation　to　each　other

in　regard　to　this　existence。　Now　the　mode　in　which　we　apprehend　a

thing　in　a　phenomenon　can　be　determined　a　priori　in　such　a　manner　that

the　rule　of　its　synthesis　can　give；　that　is　to　say；　can　produce　this　a

priori　intuition　in　every　empirical　example。　But　the　existence　of

phenomena　cannot　be　known　a　priori；　and　although　we　could　arrive　by

this　path　at　a　conclusion　of　the　fact　of　some　existence；　we　could

not　cognize　that　existence　determinately；　that　is　to　say；　we　should　be

incapable　of　anticipating　in　what　respect　the　empirical　intuition　of

it　would　be　distinguishable　from　that　of　others。

　　The　two　principles　above　mentioned；　which　I　called　mathematical；

in　consideration　of　the　fact　of　their　authorizing　the　application　of

mathematic　phenomena；　relate　to　these　phenomena　only　in　regard　to

their　possibility；　and　instruct　us　how　phenomena；　as　far　as　regards

their　intuition　or　the　real　in　their　perception；　can　be　generated

according　to　the　rules　of　a　mathematical　synthesis。　Consequently；

numerical　quantities；　and　with　them　the　determination　of　a

phenomenon　as　a　quantity；　can　be　employed　in　the　one　case　as　well　as

in　the　other。　Thus；　for　example；　out　of　200；000　illuminations　by　the

moon；　I　might　compose　and　give　a　priori；　that　is　construct；　the　degree

of　our　sensations　of　the　sunlight。　We　may　therefore　entitle　these

two　principles　constitutive。

　　The　case　is　very　different　with　those　principles　whose　province　it

is　to　subject　the　existence　of　phenomena　to　rules　a　priori。　For　as

existence　does　not　admit　of　being　constructed；　it　is　clear　that　they

must　only　concern　the　relations　of　existence　and　be　merely

regulative　principles。　In　this　case；　therefore；　neither　axioms　nor

anticipations　are　to　be　thought　of。　Thus；　if　a　perception　is　given　us；

in　a　certain　relation　of　time　to　other　（although　undetermined）

perceptions；　we　cannot　then　say　a　priori；　what　and　how　great　（in

quantity）　the　other　perception　necessarily　connected　with　the　former

is；　but　only　how　it　is　connected；　quoad　its　existence；　in　this　given

modus　of　time。　Analogies　in　philosophy　mean　something　very　different

from　that　which　they　represent　in　mathematics。　In　the　latter　they

are　formulae；　which　enounce　the　equality　of　two　relations　of　quantity；

and　are　always　constitutive；　so　that　if　two　terms　of　the　proportion

are　given；　the　third　is　also　given；　that　is；　can　be　constructed　by　the

aid　of　these　formulae。　But　in　philosophy；　analogy　is　not　the

equality　of　two　quantitative　but　of　two　qualitative　relations。　In　this

case；　from　three　given　terms；　I　can　give　a　priori　and　cognize　the

relation　to　a　fourth　member；　but　not　this　fourth　term　itself；　although

I　certainly　possess　a　rule　to　guide　me　in　the　search　for　this　fourth

term　in　experience；　and　a　mark　to　assist　me　in　discovering　it。　An

analogy　of　experience　is　therefore　only　a　rule　according　to　which

unity　of　experience　must　arise　out　of　perceptions　in　respect　to

objects　（phenomena）　not　as　a　constitutive；　but　merely　as　a

regulative　principle。　The　same　holds　good　also　of　the　postulates　of

empirical　thought　in　general；　which　relate　to　the　synthesis　of　mere

intuition　（which　concerns　the　form　of　phenomena）；　the　synthesis　of

perception　（which　concerns　the　matter　of　phenomena）；　and　the　synthesis

of　experience　（which　concerns　the　relation　of　these　perceptions）。

For　they　are　only　regulative　principles；　and　clearly　distinguishable

from　the　mathematical；　which　are　constitutive；　not　indeed　in　regard　to

the　certainty　which　both　possess　a　priori；　but　in　the　mode　of　evidence

thereof；　consequently　also　in　the　manner　of　demonstration。

　　But　what　has　been　observed　of　all　synthetical　propositions；　and　must

be　particularly　remarked　in　this　place；　is　this；　that　these

analogies　possess　significance　and　validity；　not　as　principles　of

the　transcendental；　but　only　as　principles　of　the　empirical　use　of　the

understanding；　and　their　truth　can　therefore　be　proved　only　as　such；

and　that　consequently　the　phenomena　must　not　be　subjoined　directly

under　the　categories；　but　only　under　their　schemata。　For　if　the

objects　to　which　those　principles　must　be　applied　were　things　in

themselves；　it　would　be　quite　impossible　to　cognize　aught　concerning

them　synthetically　a　priori。　But　they　are　nothing　but　phenomena；　a

complete　knowledge　of　which…　a　knowledge　to　which　all　principles　a

priori　must　at　last　relate…　is　the　only　possible　experience。　It

foll