— 114 —
How knows any one that the Soul always thinks? For if it be not a self-evident Proposition, it needs proof.       §18. I would be glad also to learn from these Men, who so
confidently pronounce, that the humane Soul, or which is all one,
that a Man always thinks, how they come to know it; nay, how they
come to know, that they themselves think, when they themselves do not
perceive it. This, I am afraid, is to be sure, without proofs; and to
know, without perceiving: ’Tis, 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 Ex-
perience makes it impudence to deny. For the most that can be said
of it, is, That ’tis possible the Soul may always think, but not always
— 115 —
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 some-
times not think, than that it should often think, and that a long
while together, and not be conscious to it self the next moment
after, that it had thought.
Locke Hum II, 1, §18, pp. 114-115