Nirvikalpa Samadhi means you are sitting in meditation and you go beyond the planes of light to nirvana. Then you come back and here you are "back in the saddle again".
Frederick LenzMy feeling is that drugs and alcohol take away from the pure experience of meditation. That does not mean that occasionally, a person couldn't have a glass of wine or a drink.
Frederick LenzThe dialectical change of mind that occurs in Buddhism is not simply the assimilation of a new philosophical basis or religious basis for viewing and interpreting experience. Rather it is the complete structural revision of that which is.
Frederick Lenz