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The readers were considering leaving Christianity and returning to Judaism, most likely because of the persecution they were experiencing. The author of Hebrews writes to encourage and exhort them to remain true to Christ, and he does so by (1) demonstrating Christ’s superiority to the prophets, angels, Moses, and the Levitical priesthood, and (2) exhorting the readers of the eternal danger that leaving Christ involves.
Here in 10:24–25 the author of Hebrews concludes his initial application of Christ’s superiority, demonstrating that the first mark of true, persevering faith is being faithful to God (10:19–25). Because the believer has access to God through Jesus Christ and in Christ he has a great high priest, the Christian must (1) draw near to God, not fall away from him, v. 22; (2) hold fast his Christian confession, not let it go, v. 23; and (3) be devoted to ministering to Christ’s body, not forsake it, vv. 24–25.
The author of Hebrews in 10:24-25 exhorts his readers to be faithful to Christ, and such faithfulness necessarily involves faithfulness to Christ’s body, the church. Faithfulness to Christ is evidenced by faithfulness to His body.
Genuine Christianity is characterized by faithfulness to the church, not falling away from it. Faithfulness to Christ is demonstrated by faithfulness to His body, the church. Faithfulness to the church is characterized by regular ministry to one another, not abandonment of other Christians.