Answer:
Both punishment and sweet reward, It will befall both fool and lord. It is a spiritual scoreboard, Your every deed it does record.
What has a bell but isn't a church. Is full of air but is not a balloon?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
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?
People take me on walks and I run and have fun. What am I?