Interesting theme, I wrote a contribution about it some time ago.

The problem is, if I write the same thing again in a comment steemcleaners will come and delete it because violation of Copyrights and so on, so hopefully it's ok if I post the link to my post where I've explained why Christians can lose their salvation according to the Bible and therefore have to be careful not to lose what they already have (Revelation 3:11).

https://steemit.com/steemchurch/@josua1/can-a-christian-lose-their-salvation