Semantic analysis Hadith "our affair difficult and hard"

In the shiah thinking Imam is Successor Prophet. And he has Perfection and wisdom that him distinguished other peoples. That in some cases، has difficult conception for public. Such as hadiths that states This fact is this word of Amir of believers، Ali (pbuh) In the Nahjolbalagheh That exalted: «our affair difficult and hard». There is disagreement in the meaning and intention of the this sentence. Some people have interpreted to the insides hadiths. Others group have interpreted to the Perfection Imams، and some scientist have interpreted to the leadership. This research، with the investigate in the similar hadiths That founded paradigmatic، to this result of that purpose is leadership. That it have too much and is not sustainable for the Public. And if this issue attributed to the hadith in the hadith، is for this reason that has much for him.