I hate you, I thank you

I hate you!
You always stand in front of me, walk faster and faster.
No matter how hard I try, I still can not catch up with you!

I hate you!
You always live happily and hopefullly.
But I think I am nothing and can not do things well.

Now I understand.
You are the one who makes me stronger and can deal with terrible things.
You are the one who shows me the possibilities of my life.