For the securing success, HIPPOCRATES required that the patient, the physician, the attendants, should all equally do their duty; if this concurrence was less rare, the happy issues of disorders would be more frequent. “Let the patient (says ARIDÆUS) have a good heart, and join forces with the physician against the disease[132].” I have seen the most stubborn ones yield to the establishment of this harmony; and recent observations have demonstrated to me, that the virulence of even cancerous disorders has submitted to methods of cure, directed perhaps with some skill, but especially executed with a docility and a regularity of which the successes constituted the best praise. ARTICLE IV. _Accessory, or Relative DISEASES._ SECTION XI. _Nocturnal Pollutions._ I have shown the dangers of an over-abundant evacuation of the seminal liquid, by excesses of venery, and by self-pollution: I have also observed, in the beginning of this work, that it was to be lost both by nocturnal pollutions through libidinous dreams, and by that running called the simple _gonorrhœa_. I shall briefly examine these two disorders. Such are the laws that unite the soul to the body, that even when the senses are locked up by sleep, the soul is taken up with ideas transmitted to it in the day. _Res, quæ in vita usurpant homines, cogitant, curant, vident,_ _Quæque aiunt vigilantes, agitantque, ea si cui in somno accidunt_ _Minus mirum est._ ACC. Another law of this union is, that without disturbing this imprisonment of the other senses; or, that I may express myself less equivocally than in metaphor, without restoring to them their sensibility to external impressions, the soul can, during sleep, beget the motions necessary to the execution of those acts of the will, which the ideas on which she busies herself suggests to her. Taken up with ideas relative to the pleasures of love, delivered up to lascivious dreams, those objects which she paints to herself, produce upon the organs of generation the same motions that they would have produced in the time of being awake, and the act naturally consummates itself in reality, if it is consummated in the imagination. The accident to HORACE in one of the places of repose on his journey to Brundusium, is well known. _Hic ego mendacem stultissimus usque puellam,_ _Ad mediam noctem expecto: somnus tamen aufert_ _Intentum veneri: tum immundo somnia visu_ _Nocturnam maculant vestem, ventremque supinum._ The organs of generation, on the other hand, when they are the first irritated, sometimes excite nothing but the imagination, and bring on dreams, which terminate as the precedently mentioned ones. These principles serve to explain the different kinds of these nocturnal pollutions.