4. Confirmed by concurrent reasons:--First, because we cannot have ideas of sensation but by the inlet of the
senses.
I. It is plain those perceptions are produced in us by exterior causes affecting our senses: because those that
want the organs of any sense, never can have the ideas belonging to that sense produced in their minds. This is too
evident to be doubted: and therefore we cannot but be assured that they come in by the organs of that sense, and
no other way. The organs themselves, it is plain, do not produce them: for then the eyes of a man in the dark
would produce colours, and his nose smell roses in the winter: but we see nobody gets the relish of a pineapple,
till he goes to the Indies, where it is, and tastes it.