Answer:
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
When set loose I fly away. Never so cursed as when I go astray.
I can be heard in a court or carried with you.
I row quickly with four oars but never comes out from under my own roof.
I am always in front of you, but you will never see me. What am I?
What made Cyclops quit teaching?