How do we know that those who are in Christ will be with the Lord forever?

1 Thessalonians 4:14 clearly states, 'For we believe that Jesus died and rose again, and so we believe that God will bring with Jesus those who have fallen asleep in him.' This assurance is rooted in the Gospel, where the certainty of Christ's resurrection serves as the foundation for the hope of believers. The resurrection signifies God's victory over death and guarantees that all who are in Christ will share in that victory. This hope is a fundamental aspect of Christian doctrine, affirming that our ultimate fulfillment comes in eternal fellowship with Christ.