I think in order to convince yourself to give your life for something, you have to have a religious belief in what you are making the sacrifice for (greater goo

I think in order to convince yourself to give your life for something, you have to have a religious belief in what you are making the sacrifice for (greater good, community, progeny, greatness of your leader, virtue of your country – or for money if you are a mercenary). That would identify the god of your religion