what is "true calling"?

hi,this may useful for you. “Career planning and placement is one of our greatest challenges in operating a two-year, professional development program for recent college graduates. True Calling™ and its proven methodologies helped dozens of our program participants identify their strengths and career and lifestyle goals. Perhaps more importantly, it gave them the confidence to pursue their individual aspirations. Program satisfaction scores related to career planning increased dramatically following Nathan’s involvement. Additionally, as an organization, we were able to develop more well rounded and effective employee teams with the insights developed by True Calling™.” http://www.yourtruecalling.com/business/