But beside these differences between _Hippocrates_ and us, the Physitians of these times and those of Antiquity; the condition of the disease, and the intention of the Physitian, hold a main consideration in what time and place soever. For Physick is either curative or preventive; Preventive we call that which by purging noxious humors, and the causes of diseases, preventeth sickness in the healthy, or the recourse thereof in the valetudinary; this is of common use at the spring and fall, and we commend not the same at this season. Therapeutick or curative Physick, we term that, which restoreth the Patient unto Sanity, and taketh away diseases actually affecting. [SN: _Diseases Chronical and Acute what they be._] Now of diseases some are cronical and of long duration, as quartane Agues, Scurvy, etc. Wherein because they admit of delay we defer the cure to more advantagious seasons; Others we term acute, that is, of short duration and danger, as Fevers, Pleurisies, etc. In which, because delay is dangerous, and they arise unto their state before the Dog-daies determine, we apply present remedies according unto Indications; respecting rather the acuteness of the disease, and precipitancy of occasion, then the rising or setting of Stars; the effects of the one being disputable, of the other assured and inevitable. And although Astrology may here put in, and plead the secret influence of this Star; yet _Galen_ in his Comment, makes no such consideration; confirming the truth of the Aphorism from the heat of the year; and the operation of Medicines exhibited. [SN: _Strong purgations not so well given in the heat of summer, and why._] In regard that bodies being heated by the Summer, cannot so well endure the acrimony of purging Medicines; and because upon purgations contrary motions ensue, the heat of the air attracting the humours outward, and the action of the Medicine retracting the same inward. But these are readily salved in the distinctions before alleadged; and particularly in the constitution of our climate and divers others, wherein the air makes no such exhaustion of spirits. And in the benignity of our Medicines; whereof some in their own natures, others well prepared, agitate not the humors, or make sensible perturbation. [Sidenote: _A Problem._]