Fortunately, in the cultivation world, the people who lectured were usually from various sects. These people were all cultivators. If it was on earth, they had some Cultural Foundation, so it wouldn't be as troublesome as teaching primary school students. However, no one would say some profound words during the lecture.
Sometimes, knowledge couldn't tolerate the slightest error, just like cultivation. Once you made a mistake in cultivation, you might be possessed by the devil, which was very dangerous. And the person who taught the Dao was often a disciple of their own sect. Even if it was not a Pro-disciple, it was still a disciple of their own sect. They didn't want these disciples to end up being possessed by the devil because of a mistake in cultivation.
