The sad Lion

Many may think that you are meaning less, but honestly stars can not be called stars without there light. we can not be called a happy complete family without you. you are the battery of a car. you are the sun in our solar system. you are a head on a humans body. you are the shield of a knight. we come across mountains, you try breaking them down,but it gets impossible. Then you help us climb them. We always fall on the road to destiny. You always pick us up and dust it off. What would we be without you? You bring food on the table. you are our leader which will always follow.