Stanza 2 Summary

Lines 5-6

And did the Countenance Divine,
Shine forth upon our clouded hills?

• The second stanza continues with the questions.
• This time, the speaker asks if the "Countenance Divine" shone upon England's "clouded hills" (maybe like these).
• "Countenance" is another word for face, so the speaker is asking if Jesus' divine face showed itself among England's cloudy hills. This is just another way of asking what the speaker has already asked before: "Did you, divine Lamb of God, show yourself here in England in ancient times?"
• The speaker imagines Jesus' face as bright and shiny, in contrast to the typically cloudy, gloomy English landscape
• The idea is that the "real" world is a dark, unpleasant place, desperately in need of divine light.

Lines 7-8

And was Jerusalem builded here,
Among these dark Satanic Mills?

• Finally, the speaker asks a question that isn't a version of "did Jesus come to England?".
• He wonders if Jerusalem was built "here," in England, among "these dark Satanic Mills."
• First things first: don't worry about that word "builded." The speaker just means "built."
• Second, what's with the reference to Jerusalem, and what's with those "Satanic Mills" anyway?
• Both Jerusalem and Satanic mills are very common figures in Blake's poetry. They appear in pretty much all of Blake's major works.
• As for Jerusalem, yes, it is a city in Israel, but that's not what the speaker is talking about here.
• He's talking about the biblical New Jerusalem described in Chapter 21 of the Book of Revelation. 
• According to Christian theology, at the end of time the earth and heavens will be destroyed. A new heaven and earth will then be built, and a holy, divine city will descend from the sky—the New Jerusalem (maybe looking a bit like this). The true believers in God will dwell with Him for all of eternity in this special city. 
• Yes, you read that correctly: a holy city will descend from the sky.
• In most of Blake's poetry, Jerusalem represents some future, ideal world of peace and harmony, where all divisions are healed, discord is no more, and the universe is once again whole. 
• While some of that idea can be glimpsed here, the speaker is really just asking if Jesus came to England and briefly brought a little bit of heaven with him (symbolized by "Jerusalem").
• Now, as for those "dark Satanic Mills." Even though the speaker is talking about Satan, he doesn't really mean our typical image of Satan. For Blake, Satan is much more than a red dude with a pitchfork. 
• In Blake's mythological system, Satan is a word for all sorts of evil things: the wrong way to look at things, hate—even the Industrial Revolution. 
• Yes, the Industrial Revolution. This whole shebang was just getting started in Blake's day, and Blake was just one of many, many people who had a huge problem with it. The Industrial Revolution basically introduced mechanized production (coal-burning factories) to the world. As you would expect, it also brought along its fair share of problems: dangerous work conditions, poor wages, child labor, pollution, etc. For William Blake, there was only one word to describe all these new "mills" popping up all over the place (a stand-in here for just about any late-eighteenth-century factory): "Satanic." 
• Okay, so "Satanic Mills" is pretty clearly a reference to the Industrial Revolution—we get that, but… there was no industrial revolution in ancient times. That's what tricky about these lines. On the one hand, yes, the speaker is obviously talking about the Industrial Revolution, but he's got something else in mind as well.
• In general, "dark Satanic mills" just refers to life on Earth as we know it—the real world, the "fallen" world that hasn't yet been redeemed by God, the world where there is not yet a new Jerusalem for all of the true believers in God.
• Basically, the speaker wonders if there was ever a heaven on Earth in England back in ancient times, and if it was even possible that Jesus would have visited such a "Satanic" place as England.
• Whew, that was a workout for sure. Let's see where the speaker is going to go next, shall we?