And for that end it will not
be requisite that I should examine each in particular, which
would be an endless undertaking; for owing to the fact that
the destruction of the foundations of necessity brings with it
the downfall of the rest of the edifice, I shall only in the
first place attack those principles upon which all my former
opinions rested.
All that up to the present time I have accepted as most
true and certain I have learned either from the senses or
through the senses; but it is sometimes proved to me that
these senses are deceptive, and it is wiser not to trust
entirely to anything by which we have once been deceived.
But it may be that although the senses sometimes deceive
us concerning things which are hardly perceptible, or very far
away, there are yet many others to be met with as to which we
cannot reasonably have any doubt, although we recognise them
by their means. For example, there is the fact that I am
here, seated by the fire, attired in a dressing gown, having
this paper in my hands and other similar matters.
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