I have heard about a couple of preachers through the years say that they have not repented in years because all their future sins are already forgiven and if they do something they would feel bad about they just say Thank you Jesus for forgiving me of that already.
Then they got arrested picking up prostitutes. Funny how that works.
It works both ways . I've been around enough Christians who have stumbled , ministries lost , marriages lost ect inspite of their belief in loss of salvation. In fact some of the most steadfast Christians are those that hold to eternal security and understand grace .
Titus 2
11¶For the grace of God that bringeth salvation hath appeared to all men,
12Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
The problem s that come with lack of assurance and fear that you have already messed up is self evident.
Some of the biggest falls in public ministry have been those that held to loss of salvation .