If the being feels incomplete, it creates an aching 'hole' that craves

'meaning'...it will resort to actions that will fill that 'hole. The brain struggles to differentiate between long and short term sources that allow our bodies to create feel good chemicals.

It only recognizes the Chemical, and pushes the being to pursue more of it not knowing the difference between beneficial and detrimental actions to get it.

If you understand this aspect of the human condition, you can manipulate human beings for personal gain through the services and products you offer.