2. Memory.
The other way of retention is, the power to revive again in our minds those ideas which, after
imprinting, have disappeared, or have been as it were laid aside out of sight. And thus we do, when we conceive
heat or light, yellow or sweet,--the object being removed. This is memory, which is as it were the storehouse of
our ideas. For, the narrow mind of man not being capable of having many ideas under view and consideration at
once, it was necessary to have a repository, to lay up those ideas which, at another time, it might have use of. But,
our ideas being nothing but actual perceptions in the mind, which cease to be anything when there is no
perception of them; this laying up of our ideas in the repository of the memory signifies no more but this,--that
the mind has a power in many cases to revive perceptions which it has once had, with this additional perception
annexed to them, that it has had them before. And in this sense it is that our ideas are said to be in our memories,
when indeed they are actually nowhere;--but only there is an ability in the mind when it will to revive them
again, and as it were paint them anew on itself, though some with more, some with less difficulty; some more
lively, and others more obscurely. And thus it is, by the assistance of this faculty, that we are said to have all those
ideas in our understandings which, though we do not actually contemplate, yet we can bring in sight, and make
appear again, and be the objects of our thoughts, without the help of those sensible qualities which first imprinted
them there.