our message: Scholars have debated who the speaker could be. The main possibilities are:
a faithful remnant of Israel, and
Isaiah himself.
Most likely, Isaiah the prophet was speaking for and with Israel.
the arm: This refers to God's strength, vividly described in the previous chapters (see Isaiah 50:2; 51:5, 9; 52:10). It would show itself in weakness and apparent helplessness through the servant's humiliation and exaltation (see 1 Corinthians 1:27–30).