The devil as a symbol represents evil in all its forms. If you dreamed of the devil surrounded by instruments of punishment, or actually punishing you, then the dream is telling you that the time has come to clear your mind and your conscious of the guilty secret you are holding onto. If you successfully fought him off, then you will short circuit those who mean you ill, and if he spoke to you, you are in for great temptations which you will find hard to resist. If you and the devil were friendly, or congenial, then it is time to have a complete medical workup done.