[AndrewC]

We should avoid the sin of presumption. We should avoid claiming perseverance until the end, passing a test we have not completed.

Jhn 10:28 And I give unto them eternal life; and they shall never perish, neither shall any [man] pluck them out of my hand.

[D-fendr]

neither shall any [man] pluck them out of my hand.

True, but you can willingly leave. This is sin: willingly doing something that separates you from God.