Answer:
I'm the source of all emotion but I'm caged in a white prison.
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
I jump when I walk and sit when I stand.
I am needed for most animals and hardcover books. What am I?
Iโm where yesterday follows today. And tomorrowโs in the middle. What am I?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.