Answer:
What can you catch but not throw?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
Born of sorrow, grows with age, you need a lot to be a sage. What is it?
I have an eye but I cannot see. What am I?
I have a head and a tail but my eyes can never see my tail.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.