The  second  subsidiary  consideration  which  I  adduced  was,
that  even  in  the  case  of  a  fully  developed  self-conscious  intel-
ligence, both  receptual  and  pre-conceptual  ideation  continue
to  play  an  important  part.     The  vast  majority  of  our  verbal


GENERAL  SUMMARY  AND    CONCLUDING  REMARKS.    413

propositions  are  made  for  the  practical  purposes  of  commu-
nication, or  without  the  mind  pausing  to  contemplate  the  pro-
positions in  the  light  of  self-consciousness.  No  doubt  in  many
cases,  or  in  those  where  highly  abstract  ideation  is  concerned,
this  independence  of  the  two  faculties  is  more  apparent  than
real :  it  arises  from  each  having  undergone  so  much  elabo-
ration by  the  assistance  which  it  has  derived  from  the  other,
that  both  are  now  in  possession  of  a  large  body  of  organized
material  on  which  to  operate,  without  requiring,  whenever  they
are  exercised,  to  build  up  the  structure  of  this  material  ab
initio.  When  I  say  "  Heat  is  a  mode  of  motion,"  I  am  using
what  is  now  to  me  a  mere  verbal  sign,  which  expresses  an
external  fact :  I  do  not  require  to  examine  my  own  ideas
upon  the  abstract  relation  which  the  proposition  sets  forth,
although  for  the  original  attainment  of  these  ideas  I  had  to
exercise  many  and  complex  efforts  of  conceptual  thought.
