This, I am afraid, is to be sure without proofs, and to know without perceiving.

It is, I suspect, a confused notion, taken up to serve an hypothesis; and none of those clear truths, that either their own evidence forces us to admit, or common experience makes it impudence to deny.

For the most that can be said of it is, that it is possible the soul may always think, but not always retain it in memory.

And I say, it is as possible that the soul may not always think; and much more probable that it should sometimes not think, than that it should often think, and that a long while together, and not be conscious to itself, the next moment after, that it had thought.
19.

That a Man should be busy in Thinking, and yet not retain it the next moment, very improbable.
To suppose the soul to think, and the man not to perceive it, is, as has been said, to make two persons in one man.