Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     And since the mind is of a man one part,
Which in one fixed place remains, like ears,
And eyes, and every sense which pilots life;
And just as hand, or eye, or nose, apart,
Severed from us, can neither feel nor be,
But in the least of time is left to rot,
Thus mind alone can never be, without
The body and the man himself, which seems,
As 'twere the vessel of the same- or aught
Whate'er thou'lt feign as yet more closely joined:
Since body cleaves to mind by surest bonds.
     Again, the body's and the mind's live powers
Only in union prosper and enjoy;
For neither can nature of mind, alone of self
Sans body, give the vital motions forth;
Nor, then, can body, wanting soul, endure
And use the senses. Verily, as the eye,
Alone, up-rended from its roots, apart
From all the body, can peer about at naught,
So soul and mind it seems are nothing able,
When by themselves. No marvel, because, commixed
Through veins and inwards, and through bones and thews,
Their elements primordial are confined
By all the body, and own no power free
To bound around through interspaces big,
Thus, shut within these confines, they take on
Motions of sense, which, after death, thrown out
Beyond the body to the winds of air,
Take on they cannot- and on this account,
Because no more in such a way confined.
For air will be a body, be alive,
If in that air the soul can keep itself,
And in that air enclose those motions all
Which in the thews and in the body itself
A while ago 'twas making. So for this,
Again, again, I say confess we must,
That, when the body's wrappings are unwound,
And when the vital breath is forced without,
The soul, the senses of the mind dissolve,-
Since for the twain the cause and ground of life
Is in the fact of their conjoined estate.
     Once more, since body's unable to sustain
Division from the soul, without decay
And obscene stench, how canst thou doubt but that
The soul, uprisen from the body's deeps,
Has filtered away, wide-drifted like a smoke,
Or that the changed body crumbling fell
With ruin so entire, because, indeed,
Its deep foundations have been moved from place,
The soul out-filtering even through the frame,
And through the body's every winding way
And orifice? And so by many means
Thou'rt free to learn that nature of the soul
Hath passed in fragments out along the frame,
And that 'twas shivered in the very body
Ere ever it slipped abroad and swam away
Into the winds of air.