We humans need to find something greater than ourselves. A purpose or cause motivates us. Being motivated stirs us on all levels of our being: the body feels more willing to expend energy; the heart is encouraged and diligent, and the mind actively analyzes and determines effective courses of action toward achieving the purpose. Ironically humans, even ones claiming Christ, often substitute idolatry as a counterfeit for motivational purpose.
There is more to know here than simply the prohibition of the Ten Commandments against the making of graven images. Why the prohibition, if the idol holds no real power?
The circle of self -- idol -- self cannot foster true life. The idol is an illusion of life. It does stir something in the soul; the fallen nature is gratified for a brief moment. This fleeting gratification motivates a person through rationalization that a substantive and valuable outside-of-self experience is achieved. Consequently, pursuit of the idol continues.
There is a larger human quest the individual believes they have begun to gain, the quest for the illumination of spirit within the self. The gratification of idols means the idolater will put faith in the idol to know the feeling of being alive. The seeking soul of an idolater thus defines self through the idol, which is effectively only a self-by-the-self function. This consuming the self to gain life is a spiritual state and results in immaturity which cannot love others. All the emotional potential of the individual to love is cannabilizied by the self. Such a state of loving self in isolation is not life. The idol is devoid of the life which only love sustains.