Does "all nations walk in the name of their gods" mean everyone else is wrong?
It can sound like a put-down. Read it next to its neighbors in Michah (Micah) and it gets more complicated. The verses just before describe a future when many nations say, "Let us go up to Hashem's mountain," and ask to be taught His ways. Swords become farm tools. Everyone sits under their own vine, with no one to scare them. Then comes our line.
The commentators do not read it the same way. Rashi (the great French commentator, 1000s) says the nations "go to destruction" because they served idols, following the old Aramaic translation of the prophets. That is the sharpest reading.
Radak (Rabbi David Kimchi, a Bible commentator, about 1200) takes it as a description of the time before that future. Until the Messiah brings the nations back to the good path, after the war of Gog and Magog (a final war described by the prophet Yechezkel, or Ezekiel), each people goes its own way. As for us, he says, even if the Temple is destroyed and we are sent into exile, we will not swap our God for another.
Metzudat David (a commentary from the 1700s) reads it as the reason we deserve that good future: they each follow their own gods, and we did not learn to copy their ways.
Now read the last line of the paragraph. In Shlomo's Temple prayer he asks God to answer the foreigner who comes from far away, "so that all the peoples of the earth will know Your name." The paragraph ends on the same hope, that all the peoples will know that Hashem is God.
So the sources disagree on how sharp the contrast is. The text itself puts the nations coming to learn first, and the line about each people's god after.
Michah 4:1-5,Rashi on Michah 4:5,Radak on Michah 4:5,Metzudat David on Michah 4:5,Melachim I 8:41-43, 8:60If I ask God to turn my heart toward Him, how is it my choice?
The paragraph asks for something that sounds odd: "May He turn our hearts to Him, to walk in all His ways." If God does the turning, what is left for you to do?
The HaMaavir Sheinah and Uva LeTzion pages take up a question like this one. There the Gemara (the central book of the Oral Torah, about 1,500 years old) gives Rabbi Chanina's rule: everything is in God's hands except fear of Heaven. And Resh Lakish (a sage of the Gemara) says that someone who comes to make themselves pure gets help.
A third teaching, in Makkot 10b, says that the Torah, the Prophets and the Writings all show that a person is led in the way he or she wants to go.
One way to put them together: you pick the direction, and the prayer asks for the push. Radak says "turn our hearts" is attached to the line before it, "May Hashem be with us." Metzudat David (a commentary from the 1700s) reads it as asking God to turn our hearts the way He turned our ancestors' hearts, back when prophecy was common.
None of these sources draws an exact line between your effort and God's help. In all three Gemara teachings, you are the one who sets the direction.
Melachim I 8:58,Berakhot 33b,Makkot 10b,Shabbat 104a,Radak and Metzudat David on Melachim I 8:58I have never been swallowed alive or swept away by a flood. Why am I saying this?
It is a fair question. The psalm uses huge pictures: enemies who would have swallowed us alive, a flood, a bird in a trap. It never says what the danger was.
Radak says the pictures are not literal. "Swallowed alive" is a way to show how hungry the enemy was, since people do not normally eat meat raw. The waters stand for troubles. The trap, he says, is exile.
The rabbis tie the words to particular stories. The Gemara says "a person rose up against us" means Haman in the Purim story, a person and not the king. A midrash says Yaakov said it during his sleepless twenty years in Lavan's house.
But look at who is speaking. "Let Israel now say" is a we-psalm, and verse 6 begins "Blessed is Hashem," so it reads as a thank-you for getting out. Ibn Ezra (a Bible commentator, 1100s) explains the bird: we had no power of our own to escape, and we got out "by the name of Hashem alone."
That also ties the psalm to the paragraph before it. There we say "we walk in the name of Hashem." The psalm ends: "Our help is in the name of Hashem."
The sources do not say that you personally must have lived through a flood. The psalm speaks in the voice of a whole people with a long memory, and you join in.
Tehillim 124,Radak on Tehillim 124:3, 124:4, 124:8,Megillah 11a,Bereshit Rabbah 68:11,Ibn Ezra on Tehillim 124:7