I have been discussing salvation with a non catholic friend and he keeps throwing up eternal verses dealing with assurance of salvation. How and what can I say in response to the Scriptural verse below where he obviously believes he has eternal life based on the context below? Thank you.
John 10:29, And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
I would suggest to your friend that there are many other verses that speak also of losing your salvation and as Catholics we know we have to take the whole Bible and not just take the verses we like.
The book of Hebrews, which was written to Jewish Christians, those who had come to believe in Christ, has many verses, such as Hebrews 2: 1 - 3, Hebrews 3:14, Hebrews 4:11, Hebrews 6:4 that speak of the possibility of one losing their salvation and were written to encourage the believer to hold on to their faith lest they fall away.
I would also explain to your friend that the verse says no one will take any out of God’s hand but that doesn’t mean that people don’t choose to walk away from God.
One more thing, there are many protestants that do not believe in once saved, always saved, such as: Mennonites, Amish, Methodist, Churches of Christ, and others.
I would ask him how he knows what he believes as a protestant is right verses other protestants that do not share his belief. How does he know he is right and others are not, which then leads to the need for the authority of a Church where the fullness of truth is found. That would then lead to 1 Timothy 3:15, the Church being the pillar and foundation of truth and in John 16:13 Jesus promised he would lead us into all truth, not some.
Those are just a couple of suggestions. I have been in similar situations and people become very defensive when they are faced with the thought that they might not be saved as they thought.
I heard some of what I have stated from Father Mitch Pacwa and Marcus Grodi. Both are great with this question.
God bless.