The image of the devil in a dream (whether he has horns and tail) indicates that you should not be tempted to use illegal means in order to achieve your goals. It means that you are in an obscure, hidden situation, or that you have a double intention. In addition, the devil can impersonate your fears, desires that you repress, or some misconduct in real life. The best weapon against the latter is to make use of love and honesty. The figure of Satan appears in the Jewish, Islamic, and Christian traditions. Originally, it represented fertility and the powers of nature. Maybe your unconscious is giving you the keys (compost) for your inner growth.