When I was a teen, I was full of the regular teenager angst. I wrote volumes of bad poetry to express my woes that the one I loved did not love me too. (In hindsight, I am glad for that because it would mean I was living in a trailer with 4 children and very big hair.) At the end of one of my books, I wrote "Is this the end or just the end?"
Now, you must understand, in highschool I was incredibly uncool. Not only did my angst music not include Led Zepplin, it mostly consisted of Bryan Adams. I had not been exposed to the song All of My Love as far as I knew. And yet, years later when I heard the song, the lyrics were very familiar. I looked it up in my book and there it was.
I still can't decide if I had heard it somewhere and just brought it into my mind for later, or if I am really as brilliant as the songwriter for All of My Love. I'm pretty sure it is not the latter.