Whence you may learn that not all particles Have functions of like moment, nor alike Support existence; but that rather those Which are the seeds of wind and warming heat Are the cause that life stays within the limbs. Therefore this vital heat and wind, residing Within the body itself, is that which quits Our dying frame. So now that we have found The nature of the mind and of the soul To be a part in some sense of the man, Let us give up the name of harmony, Which was brought down from lofty Helicon To the musicians, or else they themselves, Taking it from some other source, transferred it To what was then without a name of its own. However that may be, why, let them keep it. Do you give heed to the rest of my discourse. Now I maintain that mind and soul are bound In union with each other, forming so A single substance, but that the lord that rules Throughout the body is the reasoning power Which we call mind and intellect. Its seat Is fixed in the middle region of the breast. For here it is that fear and panic throb: Around these parts dwell joys that soothe. Here then Is the intellect or mind. The rest of the soul Dispersed through the whole body, obeys and moves At the will and propulsion of the mind, Which for itself and by itself alone Has knowledge and rejoices for itself, When nothing at that time moves soul or body. And just as, when we are attacked by pain In head or eye, we do not feel distress Through our whole body too, so often the mind Suffers pain by itself, or is envigoured By happiness, when all the rest of the soul Throughout the limbs and frame remains unstirred By any new sensation. But when the mind Has been perturbed by some more vehement fear, We see the whole soul feel with it in unison Through all the limbs; sweating and paleness then Spread over the whole body; the tongue halts, Speech dies away, the eyes grow dark with mist, The ears ring and the limbs sink under us. And indeed often we see men drop down From terror of mind. Hence easily we may learn That the soul is united with the mind; For when it has been struck by the mind’s force, Straightway it pushes and propels the body. BOOK III, lines 830-1094