But they don't have staying power, but fall away in various ways described in the parable. I don't want to be understood as teaching that we earn our way to heaven by doing good works. We could never do enough to earn anything from God. We're saved by Christ. That's a continuing state.
Protestants talk a lot about faith.
This is not a one time act, but living your life in dependence on God. That mode of life isn't a thing you do to be saved. God gives us that. Rather, it's what it means to live as a saved person. There's a common misunderstanding that Protestant theology says we are saved because of our faith.