Robert M. Zins (Reformed Protestant): Those who Reject Eternal Security/Perseverance of the Saints are those Condemned in Hebrews 6:6

  

What then shall we do with those who have a sincere but misled idea of losing their salvation? The answer is to send them back to Christ to hear the gospel all over again and hope they will be able to hear with ears divinely opened. If they reject the grace of salvation on the basis of Christ’s death alone then we have no place else to put them since they put themselves among those who crucify Christ again unto themselves and put Him to pen shame (Hebrews 6:6). We should encourage Christians to mark well the biblical pattern. There is no remedy for an alleged loss of salvation short of an examination of one’s faith to see whether or not one passes this text (2 Corinthians 13:5). (Robert M. Zins, Romanism: The Relentless Roman Catholic Assault on the Gospel of Jesus Christ! [4^th ed.; Charlotte, N.C.: A Chrisitan Witness to Roman Catholicism, 2019], 89, emphasis in bold added)