A couple linguistic questions about the Iroha poem

Question

Here is the text of the Iroha poem, sided with a possible translation (mine):

色は匂えど Iro wa nioedo | Colors, although bright,
散りぬるを Chirinuru wo | Will scatter.
我が世誰ぞ Wa ga yo tare zo | In my world, nobody
常ならぬ    Tsune naranu | Is eternal.
有為の奥山 Ui no okuyama | The remote mountains of the vicissitudes of life
今日超えて Kyou koete | [I'm] crossing today,
浅き夢見じ Asaki yume miji | Not dreaming shallow dreams,
酔いもせず Ei mo sezu | [And] not getting/being drunk.

My questions are:

1. What does the particle "zo" in l. 3 mean? Should I understand ll. 3-4 as 私（たち）の世には誰も常ならない "In my/our world, no-one is unchanging"?
2. What verb form is "miji"?
3. How would you suggest to translate the last line? "Not getting drunk"?

Any comments on my translation are naturally welcome.

[Note to self: "nioedo" ~ "niou keredo", it's an archaic verb form equating to having a contrastive conjunction after (I believe) a present (or rather non-past) tense.]

Answer 1

• ぞ is an emphasis marker. 誰ぞ常ならむ is 誰が常であろう in modern Japanese. It is essentially a rhetorical question ("Who is eternal?"), but "Nobody is eternal" is a valid translation, too.
• The last two lines have several possible interpretations, but assuming じ is voiced, it is a negative volitional auxiliary (~I will not). 酔いもせず connects to 浅き夢見じ. A literal translation would be "I will not have a shallow dream, nor will I get drunk/deluded".

Answer 2

#I'm neither a monk nor a classical Japanese expert.

色 means the same as in '色即是空' (Everything is Nothing). So the first two lines mean roughly 'Everything has perfume, but will be gone'.

Note that L4 is 常ならむ. む is a classical auxiliary verb meaning will (≒ modern う・よう). I have nothing further to add to naruto's answer.

Regarding the last two lines, there seems to be a controversy if it is 見し or 見. I always thought 見し due to a manga adaptation of The Tale of Genji. The following is about 見し variant.

L5-6 mean 'I go over the mountains of worldly things, today'. 有為 here means roughly the same as 色 above (things that are made to happen by some other things; things we see).

し of 見し is 連体形 of き which is an auxiliary verb indicating past tense. So L7-8 mean 'I was dreaming a shallow dream, without drinking'. As mentioned in the yahoo answer linked above, I have the impression this fits better (Going over the tangible world, then the author is saying it was a dream).