▁A ver ro es , ▁the ▁Kor an , ▁the ▁Cab ala ▁among ▁other ▁sources . ▁After ▁the ▁death s ▁of ▁P ico ▁and ▁F ic ino ▁this ▁line ▁of ▁thought ▁expanded , ▁and ▁included ▁Sym ph or ien ▁Champ ier , ▁and ▁Francesco ▁Giorg io . ▁ ▁Ste u co ▁ ▁De ▁per en ni ▁philosoph ia ▁lib ri ▁X ▁The ▁term ▁per en ni ▁philosoph ia ▁was ▁first ▁used ▁by ▁Ag ost ino ▁Ste u co ▁( 1 4 9 7 – 1 5 4 8 ) ▁who ▁used ▁it ▁to ▁title ▁a ▁treat ise , ▁De ▁per en ni ▁philosoph ia ▁lib ri ▁X , ▁published ▁in ▁ 1 5 4 0 . ▁De ▁per en ni ▁philosoph ia ▁was ▁the ▁most ▁sust ained ▁attempt ▁at ▁philosoph ical ▁synth esis ▁and ▁harm ony . ▁Ste u co ▁represents ▁the ▁liberal ▁wing ▁of ▁ 1 6 th - century ▁Bib lic al ▁scholar ship ▁and ▁the ology , ▁although ▁he ▁rejected ▁Luther ▁and ▁Cal vin . ▁De ▁per en ni ▁philosoph ia , ▁is ▁a ▁complex ▁work ▁which ▁only ▁contains ▁the ▁term ▁philosoph ia ▁per ennis ▁twice . ▁It ▁states ▁that ▁there ▁is ▁" one ▁principle ▁of ▁all ▁things , ▁of ▁which ▁there ▁has ▁always ▁been ▁one ▁and ▁the ▁same ▁knowledge ▁among ▁all ▁pe op les ." ▁This ▁single ▁knowledge ▁( or ▁sap ient ia ) ▁is ▁the ▁key ▁element ▁in ▁his ▁philosophy . ▁In ▁that ▁he ▁emphas ises ▁continu ity ▁over ▁progress , ▁Ste u co ' s ▁idea ▁of