Those that do not believe in OSAS are the ones that believe they save themselves by not sinning in the flesh.
Those that believe in OSAS are the ones that believe they are saved by what Jesus did on the cross and not by their ability to not sin in the flesh.
Phil 3:3
3 For we are the circumcision, who worship God in the Spirit, rejoice in Christ Jesus, and have no confidence in the flesh,
NKJV
2 Cor 11:3-5
3 But I fear, lest somehow, as the serpent deceived Eve by his craftiness, so your minds may be corrupted from the simplicity that is in Christ.
4 For if he who comes preaches another Jesus whom we have not preached, or if you receive a different spirit which you have not received, or a different gospel which you have not accepted — you may well put up with it!
Paul and False Apostles 5 For I consider that I am not at all inferior to the most eminent apostles.
NKJV
Those that believe in OSAS are the ones that believe they are saved by what Jesus did on the cross and not by their ability to not sin in the flesh.
Phil 3:3
3 For we are the circumcision, who worship God in the Spirit, rejoice in Christ Jesus, and have no confidence in the flesh,
NKJV
2 Cor 11:3-5
3 But I fear, lest somehow, as the serpent deceived Eve by his craftiness, so your minds may be corrupted from the simplicity that is in Christ.
4 For if he who comes preaches another Jesus whom we have not preached, or if you receive a different spirit which you have not received, or a different gospel which you have not accepted — you may well put up with it!
Paul and False Apostles 5 For I consider that I am not at all inferior to the most eminent apostles.
NKJV