From an evangelical Christian perspective, the most-likely author of Romans 12:10 is the apostle Paul. Paul is traditionally credited with writing the letter to the Romans, which is considered one of the most important letters in the New Testament.

Paul was a Pharisee who persecuted early Christians before his conversion on the road to Damascus. After his conversion, he became one of the most influential figures in the early Christian church, traveling extensively to spread the gospel message.

In Romans 12:10, Paul urges believers to love one another with brotherly affection and to outdo one another in showing honor. This exhortation aligns with Paul’s overarching message of unity, love, and mutual respect within the body of Christ.

Overall, evangelical Christians view Paul as a trusted and authoritative source of Christian doctrine, and his writings, including Romans 12:10, are seen as inspired by God and valuable for teaching, rebuking, correcting, and training in righteousness.