Meditation can be used to lead to a state of samadhi, a higher state of consciousness and blissful absorption. For some people, narcotic drugs are a shortcut to such happiness or a path to spiritual exploration. However, the spirit of Zen practice is to be free from attachment, such as dependence on drugs. Buddhists even eschew alcohol as damaging to consciousness and intelligence. Shifu Ming Hai opines that in Zen Buddhism, a spiritual experience is not a product for simple enjoyment, but a way of understanding the essence of our lives and to be independent of non-essential substances.