...[W]hen death comes to a man, the mortal part of him dies, but the immortal part retires at the approach of death and escapes unharmed and indestructible... [I]t is as certain as anything can be... that soul is immortal and imperishable, and that our souls will really exist in the next world.
Socrates, Apology, Crito and Phaedo of Socrates.
death, heaven, life-after-death, soul