Our earthly fathers should be a representation of our heavenly father.  However, that is not always the case.  Why?  There are a thousand different answers.  If you and I are going to be the godly fathers that we should be then that means we have to go to our heavenly father and let Him father us, guide us, and love us so we in turn can be that to our children.  We need our Father God in order to be a godly father to our sons and daughters.