For to fear death, my friends, is only to think ourselves wise without really being wise, for it is to think that we know what we do not know. For no one knows whether death may not be the greatest good that can happen to man. But men fear it as if they knew quite well that it was the greatest of evils.

Socrates (c.470-399 BC) Greek philosopher

In Plato, Apology, sec. 29