— 658 —
These cannot always be all actually in view, and then we must content our selves with the remembrance that we once saw ground for such a degree of Assent.
      §2. This is all that the greatest part of Men are capable of doing,
in regulating their Opinions and Judgments; unless a Man will exact
of them, either to retain distinctly in their Memories all the Proofs
concerning any probable Truth, and that too in the same order, and
regular deduction of Consequences, in which they have formerly
placed or seen them; which sometimes is enough to fill a large
Volume upon one single Question: Or else they must require a Man,
for every Opinion that he embraces, every day to examine the
Proofs: both which are impossible. It is unavoidable therefore, that
the Memory be relied on in the case, and that Men be perswaded of
several Opinions, whereof the Proofs are not actually in their Thoughts; nay,
which perhaps they are not able actually to re-call. Without this,
the greatest part of Men must be either very Scepticks, or change
every Moment, and yield themselves up to whoever, having lately
studied the Question, offers them Arguments; which for want of
Memory, they are not able presently to answer.
Locke Hum IV, 16, §2, p. 658