This lecture is one of the best ones. It deals with meditation. Why is it important? What does it accomplish? It also talks about the many misconceptions about meditation, which is my favorite part. For example many people think that once they achieve Samadhi through meditation they will become enlightened and liberated. But it is not so! The reason why is because it is possible to experience Samadhi without having disintegrated the ego but liberation is not possible until complete disintegration of the ego.