Answer:
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
Runs smoother than any rhyme, loves to fall but cannot climb.
I have an eye but cannot see, You'll head inside when you see me.
Metal or bone I may be, many teeth I have and always bared. Yet my bite harms no one. And ladies delight in my touch.
The more you take, the more you leave behind.
When is it bad luck to see a black cat?