Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     Wherefore it seems that soul
Hath both a natal and funeral hour.
     Besides are seeds of soul there left behind
In the breathless body, or not? If there they are,
It cannot justly be immortal deemed,
Since, shorn of some parts lost, 'thas gone away:
But if, borne off with members uncorrupt,
'Thas fled so absolutely all away
It leaves not one remainder of itself
Behind in body, whence do cadavers, then,
From out their putrid flesh exhale the worms,
And whence does such a mass of living things,
Boneless and bloodless, o'er the bloated frame
Bubble and swarm? But if perchance thou thinkest
That souls from outward into worms can wind,
And each into a separate body come,
And reckonest not why many thousand souls
Collect where only one has gone away,
Here is a point, in sooth, that seems to need
Inquiry and a putting to the test:
Whether the souls go on a hunt for seeds
Of worms wherewith to build their dwelling places,
Or enter bodies ready-made, as 'twere.
But why themselves they thus should do and toil
'Tis hard to say, since, being free of body,
They flit around, harassed by no disease,
Nor cold nor famine; for the body labours
By more of kinship to these flaws of life,
And mind by contact with that body suffers
So many ills. But grant it be for them
However useful to construct a body
To which to enter in, 'tis plain they can't.
Then, souls for self no frames nor bodies make,
Nor is there how they once might enter in
To bodies ready-made- for they cannot
Be nicely interwoven with the same,
And there'll be formed no interplay of sense
Common to each.