Answer:
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
What has many keys but can't open a single lock?
The person who makes it sells it. The person who buys it never uses it. The person who uses it never sees it. What is it?
I break down buildings, I crumble mountains but you can't see me. What am I?
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?