▁Magn us ▁would ▁address ▁the ▁subject ▁a ▁century ▁later , ▁and ▁his ▁pup il , ▁St . ▁Thomas ▁Aqu inas , ▁in ▁his ▁Sum ma ▁The olog ica ▁I - II ▁q q . ▁ 9 0 – 1 0 6 , ▁restored ▁Natural ▁Law ▁to ▁its ▁independent ▁state , ▁as ser ting ▁natural ▁law ▁as ▁the ▁rational ▁creature ' s ▁participation ▁in ▁the ▁et ernal ▁law . ▁Yet , ▁since ▁human ▁reason ▁could ▁not ▁fully ▁compreh end ▁the ▁E ternal ▁law , ▁it ▁needed ▁to ▁be ▁supp lement ed ▁by ▁revealed ▁Div ine ▁law . ▁( See ▁also ▁Bib lic al ▁law ▁in ▁Christian ity .) ▁Meanwhile , ▁Aqu inas ▁taught ▁that ▁all ▁human ▁or ▁positive ▁laws ▁were ▁to ▁be ▁jud ged ▁by ▁their ▁conform ity ▁to ▁the ▁natural ▁law . ▁An ▁un just ▁law ▁is ▁not ▁a ▁law , ▁in ▁the ▁full ▁sense ▁of ▁the ▁word . ▁It ▁retain s ▁merely ▁the ▁' app earance ' ▁of ▁law ▁in so far ▁as ▁it ▁is ▁d uly ▁constit uted ▁and ▁enfor ced ▁in ▁the ▁same ▁way ▁a ▁just ▁law ▁is , ▁but ▁is ▁itself ▁a ▁' per version ▁of ▁law .' ▁At ▁this ▁point , ▁the ▁natural ▁law ▁was ▁not ▁only ▁used ▁to ▁pass ▁judgment ▁on ▁the ▁moral ▁worth ▁of ▁various ▁laws , ▁but ▁also ▁to ▁determine ▁what ▁those ▁ ▁laws ▁meant ▁in ▁the ▁first ▁place . ▁This ▁principle ▁laid ▁the ▁seed ▁for ▁possible ▁soci etal ▁t ension ▁with ▁reference ▁to ▁t yr ants . ▁ ▁The ▁Catholic ▁Church ▁holds ▁the ▁view