There are many different types of ghosts and spirits they exist as spirits of orchards gardens nice fields rivers jungles and others. Each of these has specific powers over the environment and can provide help only within specific areas of influence they are known under the general heading of "phii" some of these are thought to live in heaven and perform mostly good deeds except when they have become annoyed some live in hell and always perform evil deeds unless they are given suitable gifts others do not have homes but wander aimlessly. This latter group can do either good or evil depending upon their individual personalities the thai who believe in spirits feel that they must leam the likes and dislikes of the phiis most likely to affect them or else they will suffer ill health reverses in business andop other misfortunes