Answer:
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
What is the freedom of birds and the pen of old men?
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
What has a head, a tail, is brown, and has no legs?
In marble halls as white as milk, lined with a skin as soft as silk. Within a fountain crystal-clear. A golden apple doth appear. No doors there are to this stronghold, yet thieves break in and steal the gold.
What is so fragile that saying its name breaks it?