The premise against eternal salvation is a fault from the beginning.
It presumes that since we have faith in being saved we are then not saved if we lose faith.
This presumes we work to remain in God's grace.
Ephesians 2
1 Corinthians 6:20
We are not our own now We are God's.
For YE ARE BOUGHT WITH A PRICE:
therefore glorify God in your body, and in your spirit, WHICH ARE GOD'S." (1 Cor. 6:20
For I know whom I HAVE BELIEVED, and am
persuaded that HE IS ABLE TO KEEP that which I HAVE COMMITTED UNTO HIM
against that day." 2 Timothy 1:12
All that the Father giveth me shall come to me; and him that cometh to me I
WILL IN NO WISE CAST OUT." John 6:37
"THE GIFTS and calling of God ARE
WITHOUT REPENTANCE" Romans 11:2
Those who are his, are eternally saved, do not sin, nor make a habit of sinning.
The opposition to eternal salvation would argue, to think we are eternally saved this gives us a license to sin.
That is not scripture and as such is invalid and an umbilical argument fostered against the true covenant.
In debate it is what is known as intellectually dishonest.
I would cease to bear concern for that which opposes eternal salvation in Christ, the Gospel.
One will never persuade toward the truth that which is committed to disseminating falsity.
Jesus did not preach conditional salvation.
Nowhere in scripture are we told all that changes in us when we come to repentance and are saved, and reborn, reversed itself the moment we lose faith.
Rather, instead of entering into an intellectually dishonest debate fostered on a false premise why not instead ponder the why behind the undertaking?
Why would anyone insist we are not eternally saved?