How do we know eternal life is promised in the Bible?

Eternal life is a central theme in the New Testament, affirmed repeatedly throughout Scripture. In 1 Timothy 4:8, Paul indicates that godliness has promise of the life that now is and of that which is to come. This is a faithful saying, highlighting that our assurance of eternal life comes from God’s covenant promises. Moreover, the gift of eternal life to God’s elect is woven throughout the fabric of the Gospel, assuring believers that they are granted this gift without condition apart from faith in Christ. The assurance of eternal life is not based on our efforts but on God's faithful promise to His people.