That was my point. I do not think there is a level of faith below which or less than which is necessary for salvation. That is what sanctification is all about.
The passages I referenced were concerned with a different but related subject. These Apostles weren't asking "what are the conditions of salvation?" They were asking, "How can I know that I am saved?"
Could you give a reference for God's testing our faith. you are talking about?
The passages I referenced should be sufficient.
Let me focus on Peter's words because he uses explicit language about the testing of our faith. Paul and James are also talking about the testing of our faith.
1Peter 1:3-7 Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead, to obtain an inheritance which is imperishable and undefiled and will not fade away, reserved in heaven for you, who are protected by the power of God through faith for a salvation ready to be revealed in the last time. In this you greatly rejoice, even though now for a little while, if necessary, you have been distressed by various trials, so that the proof of your faith, being more precious than gold which is perishable, even though tested by fire, may be found to result in praise and glory and honor at the revelation of Jesus Christ;
born again
Here, the Apostle narrows down the field, focusing solely on those who have been "born again." What follows is not inevitable for those who pretend to be born again, or pretend to be followers of Jesus.
an inheritance
Paul also speaks about our salvation in terms of an inheritance—something we own now but don't take possession of until later. All those who are born again will inherit salvation.
protected by the power of God
According to Peter, salvation is guaranteed by God for those who are born again.
proof of your faith
Those who are born again can greatly rejoice even under hardship and trial. And what is the source of their great joy and delight? They are happy because they didn't apostatize under pressure. The testing of their faith proved that their faith is durable -- more durable than Gold.
at the revelation of Jesus Christ
According to Peter, God guarantees that those born again will persevere in faith and be granted honor and glory at the appearance of Jesus Christ.
Peter is not suggesting that Christians can sit back and do nothing. Far from it, he is suggesting that some of us can rejoice because we didn't abandon our faith when circumstances pressured us to give up.
Predominately Lutheran, I think.
Right. So, the Jewish survivors of the Holocaust associate their suffering and death with Lutheranism, which isn't fair, but that's how it is. The people who allegedly believed in Jesus, The Germans (ostensibly Lutheran) were the same people who mistreated the Jewish people and sent them to the gas chambers.
Now, you and I know this isn't true. Lutherans are not antisemitic. Jesus followers are not antisemitic. The Jewish survivors got the wrong impression of Jesus from their WW2 experience. The "Jesus" associated with the Holocaust is not the Jesus of the New Testament. The "Jesus" of the Talmud is not the Jesus of the New Testament. In modern times, the Jewish people are right to reject the false "Jesus" associated with the Holocaust. They are right to reject the false "Jesus" described in the Talmud. They would not be right, however, to reject the Jesus of the New Testament.
Thank God that some Jewish people read the New Testament, come into contact with the real Jesus, and come to a saving faith.
Edit to add: My point earlier was this. God judges our hearts and I am confident that he would have mercy on any God-loving, God-fearing Jewish person living today, even in light of the fact that they reject the various "false" pictures of Jesus that exist out there. Such a person living today, with a good and honest heart, one who loves and fears God might accept Jesus as the Messiah if they were exposed to the real Jesus.