Conserving
(media.scored.co)
The Epistle of Barnabas was never added because it wasnt divinely inspired, and some of its assertions (like physical circumcision being given by to the jews by the devil) are blatantly incorrect even if the conclusion drawn from them is (namely that circumcision must be physical, by cutting sin out of our lives), but as far as early Church documents go, nothing is overtly heretical in it and it does a good job of combatting Judaization.