When all things which we gain are used for a selfish purpose, we at once become confronted with difficulties, troubles and disappointments. That is why the same mystical science may be used as a means of attaining God, or may be abused by turning it into a way called black magic. It is not that there is something special called black magic, or that there is something else called white magic; magic is all one and the same. It is how we use it that makes the difference; it is the use of it which makes it right or wrong, good or bad.