Answer:
Mountains will crumble and temples will fall. And no man can survive its endless call.
To cross the water I'm the way, for water I'm above. I touch it not and, truth to say, I neither swim nor move.
This is needed both for courage and hardcover books.
I am the yellow hem of the sea's blue skirt.
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
People take me on walks and I run and have fun. What am I?