This sentence really stood out to me because it automatically made me think. How can we tell others to be just and equal if we aren't that first? We need to all work on ourselves before we can try and work on others. Chances are, once we work on ourselves that is a huge step in the right direction.

I think this quote is describing how the actions we have made in the past will always effect us in the future. We shouldn't try and forget what happened in the past because even if the memories aren't good ones, it's important for us to remember our mistakes so we don't make them again. Also if we forget or don't make it as bad as it was; if we ignore their suffering then we aren't doing their memory justice.

clarification (on word) : dialectic is a discourse between two or more people holding different points of view about a subject but wishing to establish the truth through reasoned arguments;;

Lyotartd is very convinced of his views being right. It was this or that and no in between with him. He also tries to connect to his audience by bringing an alternative modern method.