16. No idea of abstract substance either in body or spirit.
By the complex idea of extended, figured, coloured, and
all other sensible qualities, which is all that we know of it, we are as far from the idea of the substance of body, as
if we knew nothing at all: nor after all the acquaintance and familiarity which we imagine we have with matter,
and the many qualities men assure themselves they perceive and know in bodies, will it perhaps upon examination
be found, that they have any more or clearer primary ideas belonging to body, than they have belonging to
immaterial spirit.
