No, it is keeping true to the very definition of eternal.
.How do you not see the inconsistency here? If you can forfeit something eternal, it is not eternal by the very definition of the word.
Like I said earlier, you are confusing sanctification with justification. When we are justified, we are sealed by Him...not us.
13 And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit, 14 who is a deposit guaranteeing our inheritance until the redemption of those who are God’s possession—to the praise of his glory.
Its quite clear, He holds the "deed", not us. He calls it eternal, not us.
I often wonder why folks take the gospel which Christ made so emphatically clear that ye are saved by grace through faith and this NOT of YOURSELVES, and turn right around and reject this in favor of a faith plus works gospel. And what is really amazing is they invoke Galatians 5:4 as a proof text against eternal life being eternal, the very text which condemns them for preaching against salvation by grace alone through faith alone in Christ. They have fallen from grace for teaching works save, yet they are blinded to the obvious rebuke at them in Galatians 5.