Ever since primitive man began to think, the words of our ancestors and of the gods, supported by the actions and spirits of our forefathers, have constantly impressed on us that life is the calamity for man, not death. Death gives freedom to our souls and lets them depart to their own pure home where they will know nothing of any calamity; but while they are confined within a mortal body and share its miseries in strict truth they are dead. For association of the divine with the mortal is most improper. Certainly the soul can do a great deal even when imprisoned in the body; it makes the body its own organ of sense, moving it invisibly and impelling it in its actions further than mortal nature can reach. But when, freed from the weight that drags it down to earth and is hung about it, the soul returns to its own place, then in truth it partakes of a blessed power and an utterly unfettered strength, remaining as invisible to human eyes as God himself. Not even while it is in the body can it be viewed; it enters undetected and departs unseen, having itself one imperishable nature, but causing a change in the body; for whatever the soul touches lives and blossoms, whatever it deserts whithers and dies: such a superabundance it has of immortality.
Eleazar (at Masada in A.D. 74)
(I came across this in a book I read in 1984. I wrote it down and have kept it to hand ever since.)