The devil and god are two parts of the same coin. They are an equation that is in balance as one side determines the other. Without one we do not know what the other is and vice versa. Thus one stupidity always leads to another.
Without beliefs and limitations in the mind, psychoanalysis would not be necessary. Most of the challenges are the result of repression, from which problems come and then people pay for therapy to overcome these mental limitations. The more you suppress energy, the more you face challenges.