An inquiry into one of the great religious mysteries - and what theologians, artists, writers, psychologists, priests, historians and people from all religions and walks of life have thought of heaven, where many of us still hope to go one day. Heaven's mysteriousness has lent it a discreet but powerful allure. There are two basic views: first, the afterlife will involve a vaguely defined spiritual peace - eternal solitude with God alone; the second allows for some overlap between heaven and earth, and hence relationships outside the central bond with God. Or is heaven religion's biggest con-trick but one that is impossible to debunk?