In other words, a true believer, someone who put their trust in Jesus, doesn't need to be scared that someday they will lose their faith. It can't happen.
Scripture also talks about a carnal christian whose works are burned yet he is saved though as a man running from a house on fire.
Perhaps we can say that that is the mark of a true believer, they will never stop believing in Him. The worst problem we have these days is people falsely converted, and given false assurance by an inadequate preaching of the gospel. That is the reason for teachings such as mine on John 3. Thanks for the comments
I agree with DannyTN on this matter...and perhaps go beyond what he agrees with on the matter you addressed. Jesus clearly sets out (John 6), if you are in God’s crosshairs, you cannot resist His rescue of your soul. Nor will you want to.
And, if we are rescued “forever”, this must mean “forever”. Those leaving were never born from above, but were “wanna bes” unknown to Jesus.