I always had a difficulty in thinking that when I died, that was it. I also couldn't think that I would just go up on a cloud and play a harp for eternity. The closest answer I have come to which has really made sense to me is a quote from L. Ron Hubbard:

"Life itself does not die. Only the physical organism dies. Not even a personality, apparently, dies. Death then, in truth, is a limited concept of the death on the physical part of the organism. Life and the personality, apparently, go on. The physical part of the organism ceases to function. And that is death."

Scientology has since helped me discover myself as a spiritual being. What's interesting is that Scientology hasn't invalidated my own personal beliefs. It has only expanded them.