'Eternal' in the Bible

I am not ashamed of the gospel, for it is the power of God for salvation [from His wrath and punishment] to everyone who believes [in Christ as Savior], to the Jew first and also to the Greek.

For ever since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through His workmanship [all His creation, the wonderful things that He has made], so that they [who fail to believe and trust in Him] are without excuse and without defense.

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.

and endurance, proven character (spiritual maturity); and proven character, hope and confident assurance [of eternal salvation].

so that, as sin reigned in death, so also grace would reign through righteousness which brings eternal life through Jesus Christ our Lord.

But now since you have been set free from sin and have become [willing] slaves to God, you have your benefit, resulting in sanctification [being made holy and set apart for God’s purpose], and the outcome [of this] is eternal life.

For the wages of sin is death, but the free gift of God [that is, His remarkable, overwhelming gift of grace to believers] is eternal life in Christ Jesus our Lord.

but now has been disclosed and through the prophetic Scriptures has been made known to all the nations, according to the commandment of the eternal God, leading them to obedience to the faith,