The fantasies that take root in us, especially in times of scarcity and decline have a lot of power. People rarely believe that their problems arise from their own misdeeds and stupidity. They deny to agree to those facts. Someone or something out there is to blame - the other, the world, the gods - and so salvation comes from the outside as well.
To gain power, you must be a source of pleasure for those around you - and the pleasure comes from playing to people's fantasies. Never promise a gradual improvement through hard work; rather, promise the moon, the great and sudden transformation, the pot of gold.
Fantasy can never operate alone. It requires the backdrop of the humdrum and the mundane. It is the oppressiveness of reality that allows fantasy to take root and bloom. The person who can spin a fantasy out of an oppressive reality has access to untold power. As you search for the fantasy that will take hold of the masses, then, keep your eye on the banal truths that weigh heavily on us all.
Never be distracted by people's glamorous portraits of themselves and their lives; search and dig for for what imprisons them. Once you find that, you have the magical key that will put great power in your hands.