To get yourself promoted in higher standard of life, from C-class prisoner to become A-class prisoner, that is not required. Bhagavad-gītā does not teach us that you improve your life in the respect that you are now C-class prisoner; you become A-class prisoner. No. You should not remain a prisoner. You should get yourself this prison life. This material life is prison life. Just like in prison house we are forced to undergo some sort of miseries. We may agree or not agree; we have to undergo. In prison life you cannot deny. The state agents are there. He prescribes some work; you must do it. If you say, "No, I cannot do it. I am not accustomed to do it, no." Then you'll be again more punished.
Similarly, this is our prison life. This material existence is our prison life. And prakṛti, nature, is the forceful agent. She is always enforcing us to do, to act. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). So this is going on. Now, if you want to get rid of this imprisonment, then you should begin this karma-yoga, karma plus yoga. Yoga means in connection with the Supreme. That connection with the Supreme begins with this formula, yajña, sacrifice.