'Sure' in the Bible

to those who by persistence in doing good seek [unseen but certain heavenly] glory, honor, and immortality, [He will give the gift of] eternal life.

Sin was [committed] in the world before the Law [was given], but sin is not charged [against anyone] when there is no law [against it].

For I am convinced [and continue to be convinced—beyond any doubt] that neither death, nor life, nor angels, nor principalities, nor things present and threatening, nor things to come, nor powers,