Biblical Answer

The concept of theosis in Eastern Orthodoxy can be reconciled with the Western understanding of justification by faith alone, but it requires a nuanced understanding of both concepts. In Eastern Orthodoxy, theosis refers to the process of deification, where believers become part of God's nature and participate in God's divine life. This concept is rooted in the biblical teaching that God is a Trinity of persons, and that believers are called to become part of this Trinity through their relationship with Jesus Christ.

In contrast, the Western understanding of justification by faith alone emphasizes the idea that believers are declared righteous by God through faith in Jesus Christ, and that this righteousness is a gift from God that cannot be earned through human works. While this concept may seem to contradict the idea of deification, it is actually complementary to it. In the Eastern Orthodox understanding, theosis is not just a static state of being, but a dynamic process of transformation and growth in Christ. This process is made possible through faith in Jesus Christ, which is the same faith that is emphasized in the Western understanding of justification by faith alone.

The reconciliation of theosis and justification by faith alone can be seen in the way that Eastern Orthodox theologians understand the relationship between God's grace and human free will. According to this view, God's grace is not just a external gift that is bestowed upon believers, but a dynamic and transformative power that works within believers to bring about theosis. This view is similar to the Western understanding of justification by faith alone, which emphasizes the idea that God's grace is the primary means by which believers are declared righteous. By understanding theosis and justification by faith alone in this way, Eastern Orthodox and Western theologians can find common ground and work together to promote a deeper understanding of the Christian faith.