— 695 —
Revelation in Matters where Reason cannot judge, or but probably, ought to be hearkened to.
      §9. First, Whatever Proposition is revealed, of whose Truth our
Mind, by its natural Faculties and Notions, cannot judge, that is
purely Matter of Faith, and above Reason.
      Secondly, All Propositions, whereof the Mind, by the use of its
natural Faculties, can come to determine and judge, from naturally
acquired Ideas, are Matter of Reason; with this difference still, that in
those, concerning which it has but an uncertain Evidence, and so
is perswaded of their Truth, only upon probable Grounds, which
still admit a Possibility of the contrary to be true, without doing
violence to the certain Evidence of its own Knowledge, and over-
turning the Principles of all Reason, in such probable Propositions,
I say, an evident Revelation ought to determine our Assent even
against Probability. For where the Principles of Reason have not
evidenced a Proposition to be certainly true or false, there clear
Revelation, as another Principle of Truth, and Ground of Assent,
may determine; and so it may be Matter of Faith, and be also above
Reason. Because Reason, in that particular Matter, being able to
reach no higher than Probability, Faith gave the Determination,
where Reason came short; and Revelation discovered on which side
the Truth lay.
Locke Hum IV, 18, §9, p. 695