We by degrees get ideas and names, and learn
their appropriated connexion one with another; and then to
propositions made in such terms, whose signification we have learnt,
and wherein the agreement or disagreement we can perceive in our ideas
when put together is expressed, we at first hearing assent; though
to other propositions, in themselves as certain and evident, but which
are concerning ideas not so soon or so easily got, we are at the
same time no way capable of assenting. For, though a child quickly
assents to this proposition, "That an apple is not fire," when by
familiar acquaintance he has got the ideas of those two different
things distinctly imprinted on his mind, and has learnt that the names
apple and fire stand for them; yet it will be some years after,
perhaps, before the same child will assent to this proposition,
"That it is impossible for the same thing to be and not to be";
because that, though perhaps the words are as easy to be learnt, yet
the signification of them being more large, comprehensive, and
abstract than of the names annexed to those sensible things the
child hath to do with, it is longer before he learns their precise
meaning, and it requires more time plainly to form in his mind those
general ideas they stand for. Till that be done, you will in vain
endeavour to make any child assent to a proposition made up of such
general terms; but as soon as ever he has got those ideas, and learned
their names, he forwardly closes with the one as well as the other
of the forementioned propositions: and with both for the same
reason; viz.
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