They distribute themselves over the study of sensation and examine the reciprocal relations of sensations with sensations.

Those last, condemned as misleading appearances when we seek in them the expression of the Unknowable, lose this illusory character when we consider them in their reciprocal relations.

Then they constitute for us reality, the whole of reality and the only object of human knowledge.

The world is but an assembly of present, past, and possible sensations; the affair of science is to analyse and co-ordinate them by separating their accidental from their constant relations.
FOOTNOTES: [Footnote 3: _Connaissance._--The word cognition is used throughout as the English equivalent of this, except in places where the context shows that it means acquaintance merely .-- ED.] [Footnote 4: J.S.MILL, _An Examination of Sir Wm.

Hamilton's Philosophy_, pp.