and soul physician should study this science patiently andcarefully for treating himself or the others.

For finding the causes of a disease, one should also studycarefully biography of the deviated person, specially thebackgrounds of his childhood period, which constitutes foundation of man's personality, as well as his family and social environment, his occupation and job and geographical area forrecognizing the causes of a moral disease. Even heritage shouldnot be ignored, because ill- humor( like physical diseases )issometimes inheritable.

And for treating moral vices, it should be noted that if theyhave become chronic, they should be treated patiently andcarefully and vigilantly, and one shall never get tired by lapse oftime. However, if they are superficial and extrinsic, they will betreated in a shorter period.

For this reason, correction of moral vices of youths andchildren is much easier than adults. Because the former areboth tainted and treated soon.

Imam Sadegh A. S. said:.

«عَلَيْكَ بِالْاحْداثِ فَانَّهُمْ اسْرَعُ الى‌ كُلِّ خَيْرٍ» ..

Pay attention to the youths, who are ready for quickacceptance of any goodness.. [1]

Hygiene of morality

It is also noteworthy that current medicine is actually dividedinto two parts:" therapeutic medicine" and" hygienic medicine".

What is meant by therapeutic medicine is clear. But hygienic medicine refers to preventing occurrence of diseases and

[1]HorreAmeli ,VassaeloShiite ,744 /11