Not a Scripture verse in cite. (PUN intended)
So, your idea begins with an Appeal to Ignorance and dividing "us" from "the other." Who gets caught in the trap? "They". You would never get stuck in the trap of your beliefs are not true because you believe them, right?
Although YOU do not know what lies beyond the door, it could be X. X does not have to be in Scripture to be true either, right?
What a trip! What an anti-Scriptural trip.
I can certainly explain it to you and you can do with it whatever you like, but I won't waste any effort trying to convince you. You'll have to convince yourself.
Which brother (in my short story) lives in denial of truth? Which brother are you?
Eternal life, through the lens of scripture is by definition everlasting. Without end, but also without beginning-- the divine nature. One brother can foresee and foretaste a better world while the other brother has convinced himself that there is no after-life and that should their world of comfort be gone, they will be no more. What he sees as certain death, the other recognizes as a new beginning.
He recognizes that "birth" is both a new beginning and a continuation of Life, albeit in a better, broader, bigger sense.
Of death, Jesus taught-- it's like going to sleep. Just a temporary state that you awaken from to start a new day. You must be born again, the grave as @QuantumBit references, is through scripture understood to be also, the womb.