Well, i've thought a little more about this, and I don't think my original idea is correct, but neither have I found any other insight into what this little saying might mean.
I rather think that without the specific, necessary contextual or historical background, this saying is meaningless to British English speakers (a quick Google search makes me think that it
is British)...?
Nekocat chan, it seems to me that many of your questions suggest that you're a student of British literature, rather than modern spoken English. Are the questions posed by your professor (or other kind of tutor)? For example, on this thread:
Which does the bold part mean?
1. Though it may take some time before your dream comes true
2. I hope it won't take long before your dream comes true
This is important because, if it's a question your tutor has asked, and you
must choose either (1) or (2), then people here can simply vote to choose the correct answer. In that case I'd guess at (2) myself.
If the two options are your
own ideas, then people on the forum need to spend a lot more time analysing your ideas and trying to correct them/advise/teach you.
cheers, ganbatte!
mos