'Believe' in the Bible

{What is the result} if some refused to believe? Their unbelief will not nullify the faithfulness of God, [will it]?

that is, the righteousness of God through faith in Jesus Christ to all who believe. For [there] is no distinction,

And he received the sign of circumcision [as] a seal of the righteousness by faith which [he had] {while uncircumcised}, so that he could be the father of all who believe {although they are uncircumcised}, so that righteousness could be credited to them,

but also for the sake of us to whom it is going to be credited, to those who believe in the one who raised Jesus our Lord from the dead,

Now if we died with Christ, we believe that we will also live with him,

that if you confess with your mouth "Jesus [is] Lord" and believe in your heart that God raised him from the dead, you will be saved.

How then will they call upon [him] in whom they have not believed? And how will they believe [in him] about whom they have not heard? And how will they hear about [him] without one who preaches [to them]?