Definition and Overview:
Glorification is a theological term that refers to the final step in the process of salvation, where believers are transformed into the perfect likeness of Jesus Christ. This event occurs at the end of the believer's earthly life or at the return of Christ, when the faithful are resurrected and receive their eternal, glorified bodies. It is the culmination of the sanctification process and the ultimate fulfillment of God's redemptive plan.

Biblical Basis:
The concept of glorification is rooted in several key passages of Scripture. In Romans 8:30, the Apostle Paul outlines the sequence of salvation: "And those He predestined, He also called; those He called, He also justified; those He justified, He also glorified." This verse indicates that glorification is a predetermined part of God's plan for believers.

Philippians 3:20-21 further elaborates on the transformation that occurs during glorification: "But our citizenship is in heaven, and we eagerly await a Savior from there, the Lord Jesus Christ, who, by the power that enables Him to subject all things to Himself, will transform our lowly bodies to be like His glorious body." This transformation involves the believer's physical body being changed to resemble the glorified body of Christ.

1 Corinthians 15:42-44 describes the nature of the resurrected body: "So will it be with the resurrection of the dead: What is sown is perishable; it is raised imperishable. It is sown in dishonor; it is raised in glory. It is sown in weakness; it is raised in power. It is sown a natural body; it is raised a spiritual body." These verses highlight the contrast between the mortal, corruptible body and the immortal, glorified body.

Theological Significance:
Glorification is significant because it represents the completion of God's work in the believer. It is the moment when the effects of sin are fully eradicated, and the believer is made perfect in holiness. This event is not only a personal transformation but also a cosmic one, as it coincides with the renewal of creation (Romans 8:21).

The hope of glorification provides believers with encouragement and motivation to persevere through trials and suffering. As stated in 2 Corinthians 4:17, "For our light and momentary affliction is producing for us an eternal glory that is far beyond comparison." The promise of future glory helps Christians to maintain an eternal perspective, focusing on the ultimate reward rather than temporary hardships.

Relation to Other Doctrines:
Glorification is closely related to other doctrines of salvation, such as justification and sanctification. While justification is the act of being declared righteous before God and sanctification is the process of becoming holy, glorification is the final realization of these states. It is the point at which believers are fully conformed to the image of Christ (Romans 8:29).

Additionally, glorification is linked to eschatology, the study of end times. It occurs at the second coming of Christ, when the dead in Christ are raised and those who are alive are transformed (1 Thessalonians 4:16-17). This event marks the beginning of the eternal state, where believers will dwell with God in perfect harmony.

Practical Implications:
The doctrine of glorification has practical implications for the Christian life. It encourages believers to live in a manner worthy of their calling, knowing that their ultimate destiny is to be like Christ. It also fosters a sense of hope and anticipation for the future, as believers look forward to the day when they will be free from sin and suffering.

Furthermore, the promise of glorification serves as a reminder of God's faithfulness and the certainty of His promises. As believers await this future transformation, they are called to trust in God's timing and sovereignty, confident that He will bring His work to completion (Philippians 1:6).