THREE:Passing from sensation to thought, it is admitted that abstract conceptions are incorporeal: how, then, can they be received and entertained by a corporeal substance? Or what possible connexion can there be between different arrangements of material particles and such notions as temperance and justice? This is already a sufficiently near approach to the language of modern philosophy. In another essay, which according to the original arrangement stands third, and must have been composed immediately after that whence the foregoing arguments are transcribed, there is more than an approach, there is complete coincidence.437 To deduce mind from atoms is, says Plotinus, if we may so speak, still more impossible than to deduce it from the elementary bodies. Granting that the atoms have a natural movement downwards, granting that they suffer a lateral deflection and so impinge on one another, still this could do no more than produce a disturbance in the bodies against which they strike. But to what atomic movement can one attribute psychic energies and affections? What sort of collision in the vertical line of descent, or in the oblique line of deflection, or in any direction you please, will account for the appearance of a particular kind of reasoning or mental impulse or thought, or how can it account for the existence of such processes at all? Here, of course, Plotinus is alluding to the Epicureans; but it is with the Stoic and other schools that he is principally concerned, and we return to his attack on their psychology.Striking out with due care not to get caught by any submerged tangle of roots or grasses, Larry swam the forty feet.
