Answer:
Born of sorrow, grows with age, you need a lot to be a sage. What is it?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
I go up when the rain comes down. What am I?
I am an activity involving pins flying in the air.
Angels and pilots work with me.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.