There are thousands of myths,beliefs,rituals,etc, that have been in the human experience since humans became aware that they are mortal. We are, possibly, the only animal on Earth that knows for an absolute certainty that one day he/she will die.
There are thousands of stories about resurrecting the dead. It is a myth. It cannot be done. Death is final.
But it has a beauty about it! We are of the Earth. And the Earth formed from a star. We are really formed from stardust, that is, we are formed from the Earth itself. When we die, no matter whether we are buried or cremated, we return to the Earth.
"Ashes to ashes; dust to dust."
And we never,ever, come back!