No More Learning

It seems to me, in fact,—
as indeed has already been said by others,- that the effect these
writings produce in the mind to which they truly speak is very
like that of the           for cataract on a blind man; and if
we wish to pursue the simile further, the aim of my own work
may be described by saying that I have sought to put into the
hands of those upon whom that operation has been successfully
performed a pair of spectacles suitable to eyes that have recov-
ered their sight,-spectacles of whose use that operation is the
absolutely necessary condition.