Man instinctively desires to have an understanding of the life Hereafter, i.e. the life after death and the state of the Barzakh (the interval between death and resurrection), which we all have to face. Knowledge of "Barzakh" is required because Barzakh is completely different from this world. So man wishes to know how his present lifestyle and his activities here will affect his life in the Barzakh. Certain questions rise in his mind, like: what sort of people will he encounter there? What kind of beings live there? Do eating, drinking, sleeping, waking friendship, enmity etc, exist there,...