This is the usual understanding--that TOUTO refers to the previous clause.
NOTE however that SESWSMENOI ESTE is not present tense but PERFECT PASSIVE:
"you HAVE BEEN SAVED." This is another of those neat little indicators of
the paradox of divine initiative and human response.
Regards, cwc
Carl W. Conrad
Department of Classics, Washington University
One Brookings Drive, St. Louis, MO, USA 63130
(314) 935-4018
cwconrad@artsci.wustl.edu OR cwc@oui.com
WWW: http://www.artsci.wustl.edu/~cwconrad/