I am trying to do a translation of this sentence and make it as literal as possible and keep the shine of the wordplay, as part of a wordplay game I am doing with a friend. I attempted a 直訳, but I am not sure what I should do with 死ぬほど, well, and 死にたい. There seems to be some intended puns packed into this line. By the way, I am not sure about the exact source of this quote, probably from a book or a show or something, but it is invoked online from time to time.
My first stab:
When you are thinking about death you need to know at the same time a lot of people who will die are trying so desperately to live.
And that was a complete failure and wasn't a literal translation in any sense of the word. I also thought of "so much that they could/want to die" but it didn't seem to work either. Another stab:
When you are contemplating death, a lot of people who have died have all been in the same boat where their wish to survive was the death of them.
To my dismay the last part strays semantically...
One of the things I was struggling with in particular was the identification of 昨日 and 今日. Is that hypothetical? I felt like 今日 was a temporal point with respect to あなた, while 昨日 only applied to 死んだ人達. So how do they connect? Is the sentence saying "your today is their yesterday" or is it merely metaphorical?