Tawheed” to his students for a couple of times or more, Imam Muhammad Ibn Abdul-Wahhaab wanted to repeat it again. His students said, “O Sheikh, we wish to study another book, a book of Fiqh or Hadith.” The Sheikh asked, “Why?”. His students said, “We have understood Tawheed. We want to study another science.” The Sheikh replied, “Wait, I shall give some thought to this.” A few days later, the Sheikh came to class with a troubled face. His students asked him for the reason. The Sheikh said he had come across something that angered him. “It has been related to me that the inhabitants of a house sacrificed a rooster (for a Jinn) in front of their door. I have sent someone to confirm this affair.” Few days later, the Sheikh said, “They did not sacrifice for other than Allah, but it was someone who fornicated with his mother.” Shocked, his students exclaimed, “We seek refuge with Allah! He fornicated with his mother?!! We seek refuge with Allah! He fornicated with his mother...”. Sheikh-Al-Islam then showed them the ignorance of their statement - “We understood Tawheed” - and that this was one of the greatest tricks of Satan. The students exclaimed and expressed anger on hearing a great sin, but their hearts were not angered when a Major Shirk, sacrificing to other than Allah, that exits one from Islam was mentioned. They took a major sin to be greater than Shirk. This also happens today. We are angered when we see great sins (which is good), but when we hear or see people doings acts of Shirk al-Akbar (Major Shirk) it does not move our hearts. This proves our ignorance. It proves that we have not understood Tawheed.