Ephesians 2:8-9 is part of the New Testament of the Christian Bible and is traditionally attributed to the Apostle Paul. Evangelical Christians generally accept Paul as the author of the Letter to the Ephesians, which is believed to have been written while he was imprisoned, possibly in Rome, around A.D. 60-62.

### Context of Ephesians 2:8-9
Ephesians 2:8-9 reads:

– **Ephesians 2:8-9 (NIV)**: “For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God—not by works, so that no one can boast.”

These verses encapsulate key theological themes that are significant in evangelical Christianity. They emphasize the concepts of grace and faith as essential to salvation, differentiating it from the idea of salvation through human effort or good works.

### Key Themes
1. **Grace**: The notion that salvation is a free gift from God is central to evangelical teaching. It highlights God’s unmerited favor and love towards humanity.

2. **Faith**: The idea that faith is the means through which individuals receive salvation. This underscores a personal relationship with Jesus Christ as crucial for salvation.

3. **Not by Works**: This contrasts with legalistic perspectives, affirming that no amount of good behavior can earn salvation, which is a core belief in evangelical Christianity.

### Paul’s Background
– **Apostolic Authority**: Paul is seen as a major apostolic figure in early Christianity. His background as a Pharisee and his conversion experience on the road to Damascus (Acts 9) shapes much of his theological writings.

– **Missionary Work**: Paul was instrumental in spreading the message of Jesus Christ to Gentile (non-Jewish) believers throughout the Mediterranean region.

– **Letters to the Churches**: Paul wrote multiple letters to various churches, addressing theological issues, ethical behavior, and the nature of the church.

In summary, from an evangelical perspective, the Apostle Paul is the most-likely author of Ephesians 2:8-9, and these verses are fundamental to the understanding of salvation by grace through faith, underscoring core tenets of evangelical doctrine.