not neglect all the works of the principal heretics or adherents of religions that are new and differ from the one most
commonly revered among ourselves as being more sound and
true . . . it is necessary that our scholars should find these
authors somewhere available in order to refute them. . . .
There are no scruples about having a Talmud or a Koran which belch forth against Jesus Christ and our religion a
thousand blasphemies infinitely more dangerous than those
of the heretics; since God permits us to profit from our enemies ... I think it neither an absurdity nor a danger to
have in a library all the works of the most learned and famous heretics.