How do we know the doctrine of Christ being the arm of the Lord is true?
Answered in 1 source
The doctrine of Christ as the arm of the Lord is affirmed in Isaiah 53, indicating that He embodies God's power and wisdom for salvation.
Isaiah 53 begins with the question, 'Who hath believed our report? And to whom is the arm of the Lord revealed?' (Isaiah 53:1). This term 'arm of the Lord' symbolizes God's divine power and strength, and throughout the chapter, it is shown that Jesus is the embodiment of that power. He is not merely a messenger but the very means by which salvation is executed. The New Testament confirms this in Romans 1:16, where the gospel is described as the power of God for salvation. Thus, the identification of Christ as the arm of the Lord reflects the sovereign grace of God actively involved in redeeming His elect.
Commentary