On the Nature of Things by Lucretius — Book III, More proofs the soul is mortal

And besides,
If soul immortal is, and winds its way
Into the body at the birth of man,
Why can we not remember something, then,
Of life-time spent before? why keep we not
Some footprints of the things we did of, old?
But if so changed hath been the power of mind,
⁶⁷⁵That every recollection of things done
Is fallen away, at no o'erlong remove
Is that, I trow, from what we mean by death.
Wherefore 'tis sure that what hath been before
Hath died, and what now is is now create.
Moreover, if after the body hath been built
⁶⁸⁰Our mind's live powers are wont to be put in,
Just at the moment that we come to birth,
And cross the sills of life, 'twould scarcely fit
For them to live as if they seemed to grow
Along with limbs and frame, even in the blood,
But rather as in a cavern all alone.
⁶⁸⁵(Yet all the body duly throngs with sense.)
⁶⁹⁰But public fact declares against all this:
For soul is so entwined through the veins,
The flesh, the thews, the bones, that even the teeth
Share in sensation, as proven by dull ache,
By twinge from icy water, or grating crunch
Upon a stone that got in mouth with bread.
Wherefore, again, again, souls must be thought
Nor void of birth, nor free from law of death;
Nor, if, from outward, in they wound their way,
Could they be thought as able so to cleave
To these our frames, nor, since so interwove,
⁶⁹⁵Appears it that they're able to go forth
Unhurt and whole and loose themselves unscathed
From all the thews, articulations, bones.
But, if perchance thou thinkest that the soul,
From outward winding in its way, is wont
To seep and soak along these members ours,
⁷⁰⁰Then all the more 'twill perish, being thus
With body fused- for what will seep and soak
Will be dissolved and will therefore die.
For just as food, dispersed through all the pores
Of body, and passed through limbs and all the frame,
Perishes, supplying from itself the stuff
For other nature, thus the soul and mind,
⁷⁰⁵Though whole and new into a body going,
Are yet, by seeping in, dissolved away,
Whilst, as through pores, to all the frame there pass
Those particles from which created is
This nature of mind, now ruler of our body,
⁷¹⁰Born from that soul which perished, when divided
Along the frame.

⁷¹¹Wherefore 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,
⁷¹⁶Since, 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,
⁷²¹Boneless 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
⁷²⁶Inquiry 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
⁷³¹'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
⁷³⁶To bodies ready-made- for they cannot
Be nicely interwoven with the same,
And there'll be formed no interplay of sense
Common to each.

⁷⁴¹Again, why is't there goes
Impetuous rage with lion's breed morose,
And cunning with foxes, and to deer why given
The ancestral fear and tendency to flee,
And why in short do all the rest of traits
Engender from the very start of life
In the members and mentality, if not
⁷⁴⁶Because one certain power of mind that came
From its own seed and breed waxes the same
Along with all the body? But were mind
Immortal, were it wont to change its bodies,
How topsy-turvy would earth's creatures act!
The Hyrcan hound would flee the onset oft
⁷⁵¹Of antlered stag, the scurrying hawk would quake
Along the winds of air at the coming dove,
And men would dote, and savage beasts be wise;
For false the reasoning of those that say
Immortal mind is changed by change of body-
⁷⁵⁶For what is changed dissolves, and therefore dies.
For parts are re-disposed and leave their order;
Wherefore they must be also capable
Of dissolution through the frame at last,
That they along with body perish all.
But should some say that always souls of men
Go into human bodies, I will ask:
⁷⁶¹How can a wise become a dullard soul?
And why is never a child's a prudent soul?
And the mare's filly why not trained so well
As sturdy strength of steed? We may be sure
They'll take their refuge in the thought that mind
Becomes a weakling in a weakling frame.
⁷⁶⁶Yet be this so, 'tis needful to confess
The soul but mortal, since, so altered now
Throughout the frame, it loses the life and sense
It had before. Or how can mind wax strong
Coequally with body and attain
The craved flower of life, unless it be
⁷⁷¹The body's colleague in its origins?
Or what's the purport of its going forth
From aged limbs?- fears it, perhaps, to stay,
Pent in a crumbled body? Or lest its house,
Outworn by venerable length of days,
May topple down upon it? But indeed
For an immortal perils are there none.

⁷⁷⁶Again, at parturitions of the wild
And at the rites of Love, that souls should stand
Ready hard by seems ludicrous enough-
Immortals waiting for their mortal limbs
In numbers innumerable, contending madly
Which shall be first and chief to enter in!-
⁷⁸¹Unless perchance among the souls there be
Such treaties stablished that the first to come
Flying along, shall enter in the first,
And that they make no rivalries of strength!
Again, in ether can't exist a tree,
Nor clouds in ocean deeps, nor in the fields
Can fishes live, nor blood in timber be,
⁷⁸⁶Nor sap in boulders: fixed and arranged
Where everything may grow and have its place.
Thus nature of mind cannot arise alone
Without the body, nor exist afar
From thews and blood. But if 'twere possible,
Much rather might this very power of mind
⁷⁹¹Be in the head, the shoulders or the heels,
And, born in any part soever, yet
In the same man, in the same vessel abide.
But since within this body even of ours
Stands fixed and appears arranged sure
Where soul and mind can each exist and grow,
⁷⁹⁶Deny we must the more that they can have
Duration and birth, wholly outside the frame.
For, verily, the mortal to conjoin
With the eternal, and to feign they feel
⁸⁰¹Together, and can function each with each,
Is but to dote: for what can be conceived
Of more unlike, discrepant, ill-assorted,
Than something mortal in a union joined
With an immortal and a secular
To bear the outrageous tempests?
Then, again,
⁸⁰⁶Whatever abides eternal must indeed
Either repel all strokes, because 'tis made
Of solid body, and permit no entrance
Of aught with power to sunder from within
The parts compact- as are those seeds of stuff
Whose nature we've exhibited before;
⁸¹¹Or else be able to endure through time
For this: because they are from blows exempt,
As is the void, the which abides untouched,
Unsmit by any stroke; or else because
There is no room around, whereto things can,
As 'twere, depart in dissolution all,-
⁸¹⁶Even as the sum of sums eternal is,
Without or place beyond whereto things may
Asunder fly, or bodies which can smite,
And thus dissolve them by the blows of might.

⁸¹⁹But if perchance the soul's to be adjudged
Immortal, mainly on ground 'tis kept secure
In vital forces- either because there come
Never at all things hostile to its weal,
Or else because what come somehow retire,
Repelled or ere we feel the harm they work,
. . . . . .
⁸²⁴For, lo, besides that, when the frame's diseased,
Soul sickens too, there cometh, many a time,
That which torments it with the things to be,
Keeps it in dread, and wearies it with cares;
And even when evil acts are of the past,
Still gnaw the old transgressions bitterly.
Add, too, that frenzy, peculiar to the mind,
And that oblivion of the things that were;
⁸²⁹Add its submergence in the murky waves
Of drowse and torpor.