I'm still working out my own interpretation of this song and your opinions are helping me quite a lot. I think this song is Bono's most personal in the album, he explains lots of things about his own life and feelings. It's a beautiful theme, beautifully written.
From my point of view the salesman at the front door is representing the establishment within religion (I don't know if I'm using the correct word, but I hope you understand what I mean), formal religion, the people that think they're more enlightened than the others, that they are the only ones to Know God and to interpret Him, they tell us how to get saved, they judge people and sometimes use the power they acquire from this to control people. The narrator says "these times I'm wiser and I know I don't need you to get saved, no, I'm not going to buy what you have, cause I know I only need to know God". "Three", I love this word within the song, it comes as a mystery, like the Trinity. The author knows he can make mistakes, but he knows he can recover from them: "every day I die again, and again I'm reborn".
This man, the narrator, is starting his own Odyssey, a journey of self discovery and dicovery of Divinity, thus the 16th of June reference, it's a difficult journey, that's why he has to find the courage to run into the streets and offer himself to the others, he can be rejected, he can be misunderstood, but he has a love that nobody's can defeat, God's.
I explain the lines "16th of June, Chinese stocks are going up ..... my pulse is fine" as examples of today's state of confussion, this kind of journalistic approach Bono sometimes likes to introduce in the songs to get them in context, in this way he portraits himself running in the street like loose electricity, and the band uncovering their intimacies, like their religious feelings, to everyone who wants to listen (playing striptease).
There are bad things, big problems "the roar that lies on the other side of silence (injustice, poverty, for example) the forest fire (religious intolerance, for example)" but the way to deal with them is not to deny they exist, one has to go out into the street, say what one thinks, and do what one thinks is right, the voices won't get drown. He feels he's got a gift, his music, and this gift carries a responsibility, that's why he wears it like a crown.
At the end he comes back to the main theme in the song: Grace, he found Grace inside a sound, only Grace, not all these restrictions he finds in formal religion, and thus he can breathe, breathe free.
The are some references in the song like the 9:09 and St. John Divine I'm still wondering about, the first one I suppose is a Bible reference and the second one I have the feeling he's talking about a hospital or something like that, but I can't explain why. The image of the juju man I think it's about someone who says he's a doctor, but in fact knows nothing about medicine, but in the context of the song it can also be applied to economists, for example.