Answer:
The shorter I am the bigger I am.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I sit high glowing and watch the world go by. Without me everything would seem dull and dangerous. What am I?
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure a matter of course. I am given with pleasure when taken by force.
I have two bodies joined together as one. When standing still I run and run.
What is full of holes but still holds water?