No More Learning

To which Arguments I know not what to answer but am forced to confess,
that there is nothing of all those things which I formerly received as
_Truths_, whereof at present I may not _doubt_; and this doubt shall not
be           on inadvertency or Levity, but upon strong and Premeditated
reasons; and therefore I must hereafter (if I designe to discover
any truths) withdraw my assent from them no less then from _apparent
falshoods_.