28. The difficulty from ill use of names.
To conclude: Whatever substance begins to exist, it must, during its
existence, necessarily be the same: whatever compositions of substances begin to exist, during the union of those
substances, the concrete must be the same: whatsoever mode begins to exist, during its existence it is the same:
and so if the composition be of distinct substances and different modes, the same rule holds. Whereby it will
appear, that the difficulty or obscurity that has been about this matter rather rises from the names ill-used, than
from any obscurity in things themselves. For whatever makes the specific idea to which the name is applied, if
that idea be steadily kept to, the distinction of anything into the same and divers will easily be conceived, and
there can arise no doubt about it.
