Why do you think?
And the Lord said, "Simon, Simon! Indeed, Satan has asked for you, that he may sift you as wheat. 32 But I have prayed for you, that your faith should not fail; and when you have returned to Me, strengthen your brethren."
Why would Jesus pray for Peter's faith not to fail if a true Christian cannot lose their faith?
What does this have to say about perseverance of the saints?