ement ▁on ▁the ▁gener ative ▁power ▁( de gener ation ), ▁a ▁der ang ement ▁of ▁the ▁sust ent ive ▁power , ▁or ▁disturb ance ▁of ▁home ost asis . ▁ ▁H ahn emann ▁further ▁established ▁various ▁principles ▁for ▁the ▁application ▁of ▁the ▁law ▁of ▁sim il ars , ▁including ▁a ▁cru cial ▁distinction ▁between ▁dise ases ▁of ▁a ▁fixed ▁nature ▁( ton ic ▁dise ases ), ▁and ▁those ▁of ▁a ▁variable ▁nature , ▁the ▁basis ▁for ▁the ▁later ▁discovery ▁by ▁some ▁of ▁his ▁follow ers ▁of ▁a ▁dual ▁rem edy ▁pres cri bing , ▁each ▁rem edy ▁address ing ▁one ▁‘ side ’ ▁of ▁disease , ▁the ▁t onic ▁and ▁path ic ▁sides . ▁H ahn emann ▁set ▁out ▁a ▁compreh ensive ▁approach ▁to ▁the ▁diagn osis ▁and ▁treatment ▁of ▁disease , ▁including ▁a ▁nos ology . ▁ ▁Details ▁of ▁Heil k unst ▁ ▁H ahn emann ▁argued , ▁log ically , ▁that ▁the ▁material ▁effects ▁of ▁disease ▁could ▁not ▁be ▁their ▁own ▁cause ▁( ca usa ▁mor b ii ). ▁D ise ase ▁was ▁instead ▁a ▁dynamic ▁affection ▁of ▁the ▁gener ative ▁power ▁occasion ed ▁by ▁a ▁spirit - like ▁mor bid ▁entity ▁( K rank heits w esen ) ▁[ A ph or isms ▁ 2 2 , ▁ 2 8 ] ▁that ▁had ▁the ▁power ▁to ▁imp inge ▁upon ▁the ▁gener ative ▁power ▁of ▁a ▁human ▁( M ens chen k raft w esen ) ▁[ A ph or ism ▁ 2 8 9 ▁fn . ], ▁acting ▁as