Answer:
Long and think, red within, with a nail at the end.
Whilst I was engaged in sitting. I spied the dead carrying the living
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
Bold are the first; true are the second; playful are the third; clever are the fourth; forceful are the fifth.
Strip the skin under my skin, and my flesh you'll reveal. It tastes sweet and tart, now throw out the peel. What is it?