The Devils Deception by Imam Ibn AL-Jawzi

Chapter Nine: Devil's Deception of the Worshipers in their devotions
[ 9:9 ]
Devil's Deception of those Ordering Good and
Forbidding Evil (al-dmr bi'l-ma'rnf wa'l nahyi 'an almunkar)
They are of two types: People having knowledge and people who
are ignorant.
Iblis deceives a knowledgeable person in two ways:
The first is showing off and wanting to be mentioned.
Abu Salman said: I heard Abu Ja 'far al-Manur crying while giving
the Friday sermon. I became angry and intended to get up and give
him advice openly. Then I decided not to because I did not want to
give the Khalifah be advice in front of everyone. I feared that I
might showoff, and then executed for the wrong reason.
The second way is to be angry in defense of one's own sel£ Often
times, someone who is forbidding evil is confronted with insult, so
he retaliates in defense of himself 'Umar Ibn 'Abdu'l-'Aziz once
told a man: Had I not been angry I would have ordered you to be
punished. He meant: you have made me angry so I fear that I will
punish you for my sake, not Allah's Sake.
On the other hand, if the who one orders good is ignorant, then
the devil (easily) toys with him, resulting in him causing more harm
than good because he might forbid from doing something that is
permissible, or might forbid from doing something that is considered
permissible (and valid) by some schools of jurisprudence. Sometimes
they break doors, jump over fences and beat wrongdoers and
insult them. And if they talk back at him, he becomes angry for
himself.
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