Definition and Terminology:
In the context of the Bible, non-believers are individuals who do not accept or adhere to the Christian faith. They may be referred to as "unbelievers," "the ungodly," or "the wicked" in various scriptural passages. The term encompasses those who reject the existence of God, deny the divinity of Jesus Christ, or simply do not follow the teachings of Christianity.

Biblical References and Descriptions:
The Bible addresses non-believers in several passages, often highlighting the spiritual and moral implications of unbelief. In the New Testament, the Apostle Paul speaks of non-believers in 2 Corinthians 6:14, urging believers not to be "unequally yoked with unbelievers," emphasizing the spiritual divide between those who follow Christ and those who do not.

In the Old Testament, Psalm 14:1 states, "The fool says in his heart, 'There is no God.' They are corrupt; their acts are vile. There is no one who does good." This verse underscores the biblical view that denying God's existence is both foolish and morally corrupt.

Spiritual Condition and Consequences:
The Bible presents a clear distinction between believers and non-believers, often associating unbelief with spiritual blindness and separation from God. In 2 Corinthians 4:4 , Paul writes, "The god of this age has blinded the minds of unbelievers, so they cannot see the light of the gospel of the glory of Christ, who is the image of God." This passage suggests that non-believers are under spiritual deception, unable to perceive the truth of the Gospel.

The consequences of unbelief are further elaborated in John 3:18 : "Whoever believes in Him is not condemned, but whoever does not believe has already been condemned, because he has not believed in the name of God’s one and only Son." Here, the eternal ramifications of rejecting Christ are made explicit, with condemnation being the ultimate outcome for non-believers.

Evangelism and the Call to Faith:
Despite the stark portrayal of non-believers, the Bible also emphasizes the importance of evangelism and the hope of conversion. The Great Commission in Matthew 28:19-20 commands believers to "go and make disciples of all nations," highlighting the responsibility of Christians to share the Gospel with non-believers.

In 1 Peter 3:15 , believers are encouraged to "always be prepared to give a defense to everyone who asks you the reason for the hope that is in you," suggesting that engaging with non-believers should be done with gentleness and respect, aiming to lead them to faith.

Moral and Ethical Implications:
The Bible often contrasts the moral and ethical behaviors of believers and non-believers. In Galatians 5:19-21 , Paul lists the "acts of the flesh," which include behaviors commonly associated with non-believers, such as "sexual immorality, impurity, debauchery, idolatry, and witchcraft." These acts are set against the "fruit of the Spirit" in the following verses, which characterize the life of a believer.

Conclusion:
While the Bible presents a clear dichotomy between believers and non-believers, it also offers a message of hope and redemption. Through faith in Jesus Christ, non-believers are invited to experience spiritual transformation and reconciliation with God.