The Greek word epistērízō, represented by G1991, means to support further or reestablish. Derived from ἐπί and στηρίζω, its usage translates to confirm or strengthen. It appears 4 times across 4 unique verses in the Bible, exclusively within the book of Acts.
In the biblical narrative, G1991 describes the active work of church leaders to fortify believers. It is used when confirming the souls of the disciples, urging them to persevere through tribulation Acts 14:22. Similarly, the prophets Judas and Silas confirmed the brethren with many words Acts 15:32. The term also characterizes Paul's missionary journeys, where he traveled through regions like Syria, Cilicia, Galatia, and Phrygia for the purpose of confirming the churches and strengthening all the disciples (Acts 15:41, Acts 18:23).
Several related words help clarify the context and purpose of this strengthening action:
- G5590 psychḗ (soul): This is the direct object of the action in Acts 14:22, where leaders are confirming the souls of the disciples, indicating a deep, internal form of support targeting the life and mind of a believer.
- G3101 mathētḗs (disciple): The primary recipients of this strengthening are the disciples, or learners. Paul's work in Galatia and Phrygia is described as strengthening all the disciples Acts 18:23.
- G3870 parakaléō (exhort): This action is frequently paired with confirming. In Acts 14:22, leaders are confirming the disciples and exhorting them. In Acts 15:32, prophets exhorted and then confirmed the brethren, showing that encouragement is a key component of strengthening.
- G80 adelphós (brother): This term is used to describe the believers who were confirmed by Judas and Silas, emphasizing the familial and community-focused nature of this ministry Acts 15:32.
The theological significance of G1991 is centered on the active ministry of building up the church.
- Intentional Fortification: The word describes a deliberate effort to make believers and churches more stable. This is seen in Paul's specific mission to go through regions for the purpose of confirming the churches Acts 15:41.
- Preparation for Hardship: The act of confirming is directly linked to the need for perseverance. In Acts 14:22, believers are strengthened and immediately reminded that they must enter the kingdom through much tribulation.
- A Function of Leadership: This action is performed by apostles and prophets, such as Paul, Judas, and Silas, who used teaching and exhortation to strengthen the believers (Acts 15:32, Acts 18:23).
In summary, G1991 is not a passive state but an active, pastoral verb. It signifies the vital work of reestablishing and reinforcing the faith of disciples, brethren, and entire churches. The term shows a key practice in the early church where leaders would intentionally travel to support communities, using exhortation and teaching to strengthen their souls and prepare them to endure in their faith.