Ajahn Brahmavamso - Contemplation of Death http://www.what-buddha-taught.net/Books6/Ajahn_Brahm_Contemplation_of_Death.htm
In the Jhānas it is as if the body has died along with all the conceptions of the world, all feelings, everything that is concerned with the world and the body. So really the Jhānas are death-like states, in the sense that the body has gone, it has disappeared. The worlds of the past and future have gone, they have disappeared. All your possessions have gone, they have disappeared. All your thoughts have gone, they have disappeared, along with all the struggling and doing. The coming and going, has gone, they have disappeared. Can you understand me? Can you understand what the word 'death' means? It means transcending this body. It is letting go of the body. The problem is of course, that most people when they die go and get born again, and then they have to die all over again. They keep on doing that because they don't fully die to the world, they die a little bit, but they still want to experience some more.