Some believe that this is the case, while others maintain that the posture one takes during prayer is irrelevant. Bible does not mention this issue, nor does it tell us whether we should pray in a certain position or move while praying. If you have any doubts about this practice, it is best to consult a religious leader.
One day a very religious woman came up to me and showed me a Bible verse that said it was a sin if you didn't pray on your knees. I pointed out the fact that Jesus prayed for half his life, sitting before his disciples!
The ancient sages (rabbis) stated that "praying while lying down is like sleepwalking". Such prayer is not recommended, because during prayer the entire body should be motionless and in one place - this includes the eyes. Prayer requires concentration and focus. When our body is relaxed during prayer, we tend to drift off into sleep. Furthermore, some people may find it difficult or uncomfortable to pray in this position with their head tilted down toward their chest. And since sleep has been shown to have a detrimental effect on a person's clarity of thought and spiritual development, prayers composed in this state would also lack these important qualities.
