How do we know that to die is gain for a Christian?

The assurance that to die is gain comes from the belief that death is not the end, but the beginning of a profound and eternal relationship with Christ. In Philippians 1:23, Paul expresses his desire to 'depart and be with Christ, which is better by far.' This perspective comes from the understanding that upon death, believers enter into eternal life, free from suffering and sin, and into the presence of Jesus. This teaching comforts Christians, emphasizing that while earthly life entails trials and responsibilities, the eternal state in glory with Christ brings ultimate fulfillment and joy.