— 106 —
All our Ideas are of the one or the other of these.       §5. The Understanding seems to me, not to have the least
glimmering of any Ideas, which it doth not receive from one of these
two. External Objects furnish the Mind with the Ideas of sensible qualities,
which are all those different perceptions they produce in us: And
the Mind furnishes the Understanding with Ideas of its own operations.
These, when we have taken a full survey of them, and their
several Modes, Combinations, and Relations, we shall find to
contain all our whole stock of Ideas; and that we have nothing in
our Minds, which did not come in, one of these two ways. Let any
one examine his own Thoughts, and throughly search into his
Understanding, and then let him tell me, Whether all the original
Ideas he has there, are any other than of the Objects of his Senses; or
of the Operations of his Mind, considered as Objects of his Reflec-
tion: and how great a mass of Knowledge soever he imagines to be
lodged there, he will, upon taking a strict view, see, that he has not
any Idea in his Mind, but what one of these two have imprinted; though,
perhaps, with infinite variety compounded and enlarged by the
Understanding, as we shall see hereafter.
Locke Hum II, 1, §5, p. 106