Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
It's in your hand though you can not feel it. Only you and time can reveal it.
Long and slinky like a trout, never sings till it's guts come out.
I walked and walked and at last I got it. I didn't want it. So I stopped and looked for it. When I found it, I threw it away.
Where do you go in through one hole and come out through two holes at the same time?
What is lighter than what it is made of?