In truth, there is no self and when the mind realizes the futility of grasping for something, anything that is always in a state of flux, happiness is the result. There can be no death of a self that has not been born. There can be no birth of that which does not die. Birth and death are illusions and what exists is. Eternity does not exist because it posits a beginning.
Eternity is the present moment.
No self, no birth, no death, no beginning and no end. People cry to laugh again and people laugh knowing that tears await them. Yes, there is pain in the body. Yes, there is mental torment, too. It is so difficult to comprehend this.