How we cite our quotes: (Section.Paragraph)
Quote #4
We of Israel taught that the Poetic Genius (as you now call it) was the first principle, and all the others merely derivative, which was the cause of our despising the Priests and Philosophers of other countries, and prophesying that all Gods would at last be proved to originate in ours, and to be the tributaries of the Poetic Genius. (5.6)
Have you ever wondered where religion comes from? Blake's answer is: poetry. In fact, the poets had it right in the first place. The priests and philosophers were just riffing on the poets' original ideas ("Poetic Genius"). Unsurprisingly, Blake thinks that religion gets a lot of the poets' ideas wrong.
Quote #5
I was in a printing-house in Hell, and saw the method in which knowledge is transmitted from generation to generation. (6.1)
Of all the places to see in Hell, a publishing house is a pretty weird tourist destination. However, the printing-house was where Blake worked his day job. Not only did he know a lot about what went into printing, he also had an important perspective on what printing actually did for the world. Namely, as he describes here, printing was how ideas and knowledge got around—you know, before the Internet. Since he printed The Marriage of Heaven and Hell, himself, Blake must have been particularly interested in how his ideas would get out into the world. We wonder what he would have thought of us.