Um no, John said someone who lives in sin has never met God. Your claiming that a person can sin themselves out of salvation, meaning they knew God at one time, and then lost it.
You asked if Paul contradicts John, and I said no, they both teach the saints can forfeit salvation. Now you want proof, so here you go:
In Romans 6:16, Paul says to the saints who choose to give sin dominion over themselves that it's "unto death".
In 1 John 2: 24, John says, "Let that therefore abide in you, which ye have heard from the beginning.
If that which ye have heard from the beginning shall remain in you, ye also shall
continue in the Son, and in the Father."
Now, 11th hour came up with that kooky idea that Paul's "unto death" ain't referring to
spiritual death
even though it's contrasted with "righteousness", a clearly
spiritual concept. I'm sure you'll have something similar to show how if what we've "heard from the beginning" fails to "remain in" us, we can still "continue" in God, right?
John said a saint can not return to a life of sin
Nope, he said a saint "cannot sin". A backslider by definition is no longer a saint.
if you jump out. that must mean you did not trust the pilot now did you?
Really? What if the loving wife you kissed goodbye before boarding a bi-plane and sitting down behind a pilot
in whom you placed your implicit trust - sends you a text of her flipping you off while running a train with 3 dudes, and you decide to end it all? Does that mean you never trusted the pilot? See what I did there?