What the Cat Left On the Doormat

How can I understand fear? A definition? A description? Evidence? Measurement? Reason? I don't understand. I can't Fear is a rush of hormones But I don't understand hormones Fear is my blood. Pulsing my veins But I can't understand pulse. Or veins And I don't know what blood is Yet Fear is the dark. But I only know dark I daren't enter the light. I don't know why I just can't. I really can't Fear is... A shadow in the sky! Now! Right now! Do I hide? Do I run? Neither! The unseen blur behind! I had no chance! I didn't understand why. I couldn't But, at the end, I understood fear And blood (Entry for "the hunt" contest)