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 Perspective:
The Bible addresses non-believers in various contexts, often contrasting their lives and destinies with those of believers. In the New Testament, the Apostle Paul speaks of non-believers in 2 Corinthians 6:14, urging Christians not to be "unequally yoked with unbelievers," highlighting the spiritual divide between those who follow Christ and those who do not.

Characteristics and Behavior:
Scripture often describes non-believers as living according to the flesh and being separated from the life of God. Ephesians 4:17-18 states, "So I tell you this, and testify in the Lord, that you must no longer walk as the Gentiles do, in the futility of their thinking. They are darkened in their understanding and alienated from the life of God because of the ignorance that is in them due to the hardness of their hearts."

Spiritual Condition:
Non-believers are depicted as spiritually blind and in need of salvation. 2 Corinthians 4:4 explains, "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 blindness is a barrier to understanding and accepting the truth of the Gospel.

Eternal Consequences:
The Bible warns of the eternal consequences for those who remain in unbelief. John 3:18 states, "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." This underscores the importance of faith in Jesus Christ for salvation.

Christian Responsibility:
Believers are called to witness to non-believers, sharing the message of the Gospel with love and compassion. The Great Commission in Matthew 28:19-20 instructs Christians to "go and make disciples of all nations," emphasizing the responsibility to evangelize and bring the truth of Christ to those who do not yet believe.

Hope for Non-believers:
Despite the spiritual condition of non-believers, the Bible offers hope for redemption and transformation through faith in Jesus Christ. Romans 10:9 promises, "If you confess with your mouth, 'Jesus is Lord,' and believe in your heart that God raised Him from the dead, you will be saved." This assurance of salvation is available to all who turn to Christ in faith.

Conclusion:
While the Bible presents a clear distinction between believers and non-believers, it also extends an invitation to all to come to the knowledge of the truth and experience the grace and mercy of God through Jesus Christ.