What I claim to be true is simply what appears to be worthwhile to me since people, naturally, only listen to themselves. In this regard, knowledge and truth are relative and subjective. The natural criticism that each of us has toward others exists only so that we will rise above our ego and discover the real truth. A critical discussion in the classroom shows children that there are multiple opinions. Group work done in a circle helps each child to open their hearts and ears to one another and discuss the opinions of others in a neutral or positive way. Special exercises can be taught in which children express their own opinions and then switch sides and defend the opposite opinion. Even more advanced work occurs when each child eliminates the hold he has on his own opinion in order to find a common opinion, which is the true opinion.