Thus nature of mind is triple; yet those all
Suffice not for creating sense- since mind
Accepteth not that aught of these can cause
Sense-bearing motions, and much less the thoughts
A man revolves in mind. So unto these
Must added be a somewhat, and a fourth;
That somewhat's altogether void of name;
Than which existeth naught more mobile, naught
More an impalpable, of elements
More small and smooth and round. That first transmits
Sense-bearing motions through the frame, for that
Is roused the first, composed of little shapes;
Thence heat and viewless force of wind take up
The motions, and thence air, and thence all things
Are put in motion; the blood is strook, and then
The vitals all begin to feel, and last
To bones and marrow the sensation comes-
Pleasure or torment. Nor will pain for naught
Enter so far, nor a sharp ill seep through,
But all things be perturbed to that degree
That room for life will fail, and parts of soul
Will scatter through the body's every pore.
Yet as a rule, almost upon the skin
These motion aIl are stopped, and this is why
We have the power to retain our life.
Now in my eagerness to tell thee how
They are commixed, through what unions fit
They function so, my country's pauper-speech
Constrains me sadly. As I can, however,
I'll touch some points and pass.
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