 Here's a passage that should really make you feel good about your salvation, comfortable in your salvation. In Jeremiah chapter 32 verses 38, 39, and 40, he says that, and they shall be my people. Notice what he says though. He says also that I will give them one heart and one way that they may fear me. And he says always. But then he says that I will make an everlasting covenant with them and they will never depart from me nor will God depart from them. And in case someone thinks that he's just speaking about Israel, this also applies to Gentiles as well. He just said that they will, they shall be my people. Which he says the same thing regarding Gentiles in Hosea 223. Because I will call those people who are not my people, my people and they shall call me their God. And so he says that once he puts his spirit in us, he will not depart from us and we will not depart from him. That is the very definition of eternal security.