There are kings in every province engaged in doing good to their respective selves. But none of them has been able to become an Emperor. The title of Emperor is difficult to be achieved.
गृहे गृहे हि राजानः स्वस्य स्वस्य प्रियंकराः। न च साम्राज्यमाप्तास्ते सम्राट्छन्दो हि कृच्छ्रभाक्॥