"If he chooses to follow false teachings after becoming a Christian? He is being untrue to Christ..
But, he is still saved. 2 Corinthians 3:11-15 tells us so."
No you cannot follow false teaching and still be saved. You must do an about face. Denying you know Christ as Peter did and remaining in that state does not lead to one being saved. That is why afterwards Peter repented and spoke with boldness. He was in fear of dying, not simply choosing to follow false doctrine. Every time Peter fell he would repent and get back up and not repeat the prior offense. I didn't address that in my first response to this.
2 Corinthians 3:11-15
11 For if what is passing away was glorious, what remains is much more glorious.
12 Therefore, since we have such hope, we use great boldness of speech—13 unlike Moses, who put a veil over his face so that the children of Israel could not look steadily at the end of what was passing away. 14 But their minds were blinded. For until this day the same veil remains unlifted in the reading of the Old Testament, because the veil is taken away in Christ. 15 But even to this day, when Moses is read, a veil lies on their heart.
My bad....
1 Corinthians 3:11-15
11 For no one can lay any foundation other than the one already
laid, which is Jesus Christ. 12 If anyone builds on this foundation
using gold, silver, costly stones, wood, hay or straw, 13 their work
will be shown for what it is, because the Day will bring it to light.
It will be revealed with fire, and the fire will test the quality of each
person’s work. 14 If what has been built survives, the builder will
receive a reward. 15 If it is burned up, the builder will suffer
loss but yet will be saved—even though only as one escaping
through the flames.
The saved one as one escaping through the flames lived by false teaching and understanding (wood, hay, and stubble).
His works will be burned in Fire. He will be saved.
15 If it is burned up, the builder will suffer loss but yet will be saved
—even though only as one escaping through the flames.
Why still saved?
He believed in Jesus Christ!
11 For no one can lay any foundation other than the one already
laid, which is Jesus Christ.
That's what it tells us. And, that's what I have been telling you.
1 Corinthians 3:11-15
11 For no one can lay any foundation other than the one already
laid, which is Jesus Christ. 12 If anyone builds on this foundation
using gold, silver, costly stones, wood, hay or straw, 13 their work
will be shown for what it is, because the Day will bring it to light.
It will be revealed with fire, and the fire will test the quality of each
person’s work. 14 If what has been built survives, the builder will
receive a reward. 15 If it is burned up, the builder will suffer
loss but yet will be saved—even though only as one escaping
through the flames.
For a moment when the 'wood, hay and straw, believer is 'evaluated' by fire, he will think he is in the Lake of Fire.
Then, much to his surprise! He will realize that his resurrection body can not be destroyed by the flames.
To become eternally grateful from that point on for being saved by God who gives mercy even when His own
stubbornly persists in doing wrong after they are saved!
14 If what has been built survives, the builder will receive a reward.
15 If it is burned up, the builder will suffer loss but yet will be saved—
even though only as one escaping through the flames.
grace and peace!