What does the Bible say about evidence of spiritual life?

In 1 John 5:1-5, the Apostle John teaches that those who believe that Jesus is the Christ are born of God, which signifies spiritual life. This new birth is evidenced by a love not only for God but also for fellow believers. This divine love, referred to as agape love, is crucial as it shows that true believers are united in one spiritual family, separate from the world due to their faith in Jesus Christ's redemptive work. Consequently, those who have been spiritually reborn will exhibit love and genuine concern for their brothers and sisters in Christ, proving their new identity as children of God.