'Assurance' in the Bible

and your life shall hang in doubt before you; and you shall fear night and day, and shall have no assurance of your life.

Yet God preserves the mighty by his power. He rises up who has no assurance of life.

because he has appointed a day in which he will judge the world in righteousness by the man whom he has ordained; of which he has given assurance to all men, in that he has raised him from the dead."

that their hearts may be comforted, they being knit together in love, and gaining all riches of the full assurance of understanding, that they may know the mystery of God, both of the Father and of Christ,

and that our Good News came to you not in word only, but also in power, and in the Holy Spirit, and with much assurance. You know what kind of men we showed ourselves to be among you for your sake.

Now faith is assurance of things hoped for, proof of things not seen.