Calamities and adversities make them give up the distinguished characteristics of Muslims (patience, hope in future and work for improvement of circumstances). They advise people with narration's of events and facts but do not take any lesson from them. They are good at preachings but bad at practice, therefore they always talk of lofty deeds but their actions belie their words.
Mola Ali (a.s) Ibn e Abu Talib (a.s)
Ref: Nahjul Balagha [ Saying # 150 (part) ]