v1: It is clear that Deborah was the leader, with Barak second.
v2: When the leaders lead, and the people serve willingly, then there is victory and blessing. We are all called to play our part in God' service, and be willing to serve in whatever He calls (1 Thess 2.8).
v3: The response of the people was praise to God; the Lord, the God of Israel had fought on behalf of His people. Even through battles and suffering, the people of God can sing praises to Him.
v4-5: Deborah referred to past victories; the inference was that such victories were past, not present!
v6-8: Difficult times in Israel; see Lev 26.22. The people were afraid, living in cities, not villages (cities were walled, villages were not); travel became dangerous; and the people had fallen into idolatry. They were not prepared for war (compare 1 Sam 13.19-22), which left them vulnerable to enemy attack. They abandoned the highways of truth, and walked the byways of false doctrine!
The answer came with Deborah, "a mother in Israel" (v7), and with the rulers who offered themselves with the people, they were "willing volunteers"(v9). Deborah's heart rejoiced at their willingness.
v10-12: Deborah refers to the nobility, those riding white horses; she refers to judges and princes, who sit on saddle blankets; she also refers to the ‘ordinary’ people, who walk along the road. All have reason to praise God for their restored liberty.
v13: The men who were left were few, for most of Israel did not join the battle; they came to faced an army of nobles, led by Sisera. But they were the people "of the Lord", and where their trust was in God, there would be a great victory, even against the mighty.
v14-18: Excuses and Examples! Some served and some stayed; some were faithful and some were fearful. We may test our own willingness to serve God.
v14-15: Men joined from Ephraim, Benjamin, Makir (part of Manasseh), Zebulun and Issachar; even those who carried a "recruiter's staff", who were not used to fighting.
v15-16: Reuben was strong on meditation and weak on action. Their concerns lay at home with the well-being of their flocks.
v17: Others stayed in safety; Gilead remained beyond the Jordan, Dan stayed with his ships, and Asher remained by the sea. We can always find excuses for not serving.
v18: The people of Zebulun and Naphtali risked their lives in God's service (also in 6.35), and here they were honoured for their faithfulness. Later, in Matt 4.15-16, Jesus Christ lived in their land. We may also say that our failure to serve can discourage others.
v19-20: Deborah speaks of the kings of Canaan fighting, but also the stars of heaven; she saw the reality of warfare in the heavenly places.
v23: Meroz was cursed bitterly, because its people did not come to help. Presumably, it was close to the place of battle. Their failure was not that they did not help Deborah, but they did not help the Lord. The town of Meroz is not mentioned anywhere else in the Bible; such was the curse that fell upon it.
v24: God used a weak but willing instrument to shame the mighty; Barak should have earned this blessing, but he missed out; 4.9.
v29-30: Sisera had expected victory; he had won many before; but not this time!