Answer:
The distance from the top of your head to the floor standing up straight.
It comes from crystal and melts to a treat. Add it to your tea to make it sweet. What is it?
How can a pants pocket be empty and still have something in it?
Most people need it, some ask for it, some give it, but almost nobody takes it. What is it?
Mountains will crumble and temples will fall, and no man can survive its endless call. What is it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.