Even scientifically it is accepted that energy goes on and can indeed transfer and transmute, but immortality, in the sense that most people think about it, is not possible. The ego, that which we call us, our personality is not real. It is merely a collection of experiences that inform our bodies and constructs the illusion that we are greater than we are. People want it all, they seek to imbue the energy within us a distinct character and want to believe in a human like soul with the characteristics that make us distinct individuals in life. It is as Buddha realised the cause of much pain, suffering and anguish. True nirvana is found at points by us all, even those who dismiss spirituality at points where we lose "ourselves". Whether that is at points where we lose ourselves in doing something really well that we love (art,music,sport) or in the ecstasy of life, devotion and love, it is freeing ourselves from physical bonds that reminds us of how bodies define and limit us.