The meaning of immortality in human experiences

The living feeling of his life does not begin at a known moment, nor does it end at a known moment. You only know yourself as alive. As for when this life began, no matter how much you try to go back in memory, you will never remember when it began, and as for when it ends, you will not be there with this body and these faculties of yours when Death comes, so you know when it ends?The ones who kno...