1. Ideas of particular substances, how made.
The mind being, as I have declared, furnished with a great number of
the simple ideas, conveyed in by the senses as they are found in exterior things, or by reflection on its own
operations, takes notice also that a certain number of these simple ideas go constantly together; which being
presumed to belong to one thing, and words being suited to common apprehensions, and made use of for quick
dispatch, are called, so united in one subject, by one name; which, by inadvertency, we are apt afterward to talk of
and consider as one simple idea, which indeed is a complication of many ideas together: because, as I have said,
not imagining how these simple ideas can subsist by themselves, we accustom ourselves to suppose some
substratum wherein they do subsist, and from which they do result, which therefore we call substance.