Res divina
Cicero , who was both a senator and augur , investigates the nature of "res divinae" and "res humanae" ( human affairs ) in his treatise "De Natura Deorum" ( "On the nature of the gods" ) . 
<triplet> Cicero <subj> augur <obj> position held <triplet> De Natura Deorum <subj> Cicero <obj> author