No, because it is not the believer persevering, but the believer being preserved by God.(Eph.4:30)
But I am glad to note that there is a difference, since many Baptists believe the two are the same, which they are not.
The question is, can a believer leave God to the point that he never returns in time, and God takes him home.
I think that is what the sin unto death is for (1Jn.5:16)
I believe we are in agreement on this.
The only strength by which the saints are enabled to encounter with all oppositions and trials, is only by Jesus Christ, who is the captain of their salvation, being made perfect through sufferings; who hath engaged His faithfulness and strength to assist them in all their afflictions, and to uphold them in all their temptations, and to preserve them by His power to His everlasting kingdom.
John 16:33, 15:5; Phil. 4:11, Heb. 2:9,10; 2 Tim. 4:18.
This really has nothing to do with POTS or OSAS. Both of us would agree that a true believer will not lose their salvation. Will the Lord take home a believer if he is bringing dishonor to our Lord Jesus. Absolutely. I believe the Croatians found that out with communion.