Read the second half of my first paragraph again. Feel free to ask for clarification on any part of it.
Part of the biblical definition of pisteuo and genuine pistis is obeying God. That's a start and an important one - to pisteuo as God commands - for example, to believe in the name of God's Son Jesus Christ as God commands - then add the second command in 1John3:23 - to obey God's command to love one another as Jesus Christ commanded.
From there we can begin adding other words and explanations to pisteuo FROM Scripture in order to allow God to define and explain pisteuo and pistis comprehensively.
For example, there's another thread in process re: loss of salvation. Part of the fairly contentious discussion at the moment (and the topic is most always contentious) is whether or not endurance is part of faith. I would assume you think you need to remain surrendered no matter what happens in your life and if you fail long the way, then you return to that surrendered state. So, does your surrender need to last? Or do you never fail?
If faith and faithing stops, everything stops. Not all at once, like melting snow. And that's only after He accepts and seals His spirit in the surrendered life.
Before the surrendered life is accepted 3 out of the 4 soils will fail. Those3 failed soils can keep responding as long as the Father is still drawing them.
That would have come out in my salvation process thread, but we didn't get that far.