— 297 —
As clear an Idea of Spirit, as Body.       §5. The same happens concerning the Operations of the Mind,
viz. Thinking, Reasoning, Fearing, etc. which we concluding not to
subsist of themselves, nor apprehending how they can belong to
Body, or be produced by it, we are apt to think these the Actions of
some other Substance, which we call Spirit; whereby yet it is evident,
that having no other Idea or Notion, of Matter, but something
wherein those many sensible Qualities, which affect our Senses, do
subsist; by supposing a Substance, wherein Thinking, Knowing,
Doubting, and a power of Moving, etc. do subsist, We have as clear a
Notion of the Substance of Spirit, as we have of Body; the one being
supposed to be (without knowing what it is) the Substratum to
those simple Ideas we have from without; and the other supposed
(with a like ignorance of what it is) to be the Substratum to those
— 298 —
Operations, which we experiment in our selves within. ’Tis plain
then, that the Idea of corporeal Substance in Matter is as remote from
our Conceptions, and Apprehensions, as that of Spiritual Substance,
or Spirit; and therefore from our not having any notion of the
Substance of Spirit, we can no more conclude its non-Existence, than
we can, for the same reason, deny the Existence of Body: It being as
rational to affirm, there is no Body, because we have no clear and
distinct Idea of the Substance of Matter; as to say, there is no Spirit,
because we have no clear and distinct Idea of the Substance of a
Spirit.
Locke Hum II, 23, §5, pp. 297-298