What does the Bible say about being saved or lost?

The Bible, particularly in Romans 10, emphasizes that the critical issue in being saved or lost is based on whether a person comes to know and submit to God's righteousness. Paul expresses a deep burden for Israel, indicating that many have a zeal for God but lack true knowledge of His righteousness. God has predetermined who will be saved before the foundation of the world, and this election is what ultimately distinguishes the saved from the lost. The pivotal evidence of salvation is faith in Christ's accomplished work, rather than an individual's attempts to establish their own righteousness.