'Arm' in the Bible
They do all their deeds to be seen by men; for they make their phylacteries (tefillin) wide [to make them more conspicuous] and make their tassels long.
“He has done mighty deeds with His [powerful] arm;He has scattered those who were proud in the thoughts of their heart.
This was to fulfill what Isaiah the prophet said: “Lord, who has believed our message? And to whom has the arm (the power) of the Lord been shown (unveiled, revealed)?”
The God of this people Israel chose our fathers and made the people great and numerous during their stay [as foreigners] in the land of Egypt, and then with an uplifted arm He led them out of there.
Therefore, since Christ suffered in the flesh [and died for us], arm yourselves [like warriors] with the same purpose [being willing to suffer for doing what is right and pleasing God], because whoever has suffered in the flesh [being like-minded with Christ] is done with [intentional] sin [having stopped pleasing the world],