Answer:
I am in the middle of water but am not an island.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
I stink in living but when dead smells good.
What is it that makes tears without sorrow. And takes its journey to heaven?
Long and thin red within with a nail at the end.
It is something you make after you've weighed your options.