"Management is the opportunity to help people become better people. Practiced that way, it's a magnificent profession." - Professor Clay Christensen
I think this quote is an excellent supplement to the article. The article talks about four different emotional drivers that motivate employees, and how their morale affects their overall performance. If a manager is able to satisfy these emotional drivers, it develops positive employee engagement in the workplace.
This is a great example of the behavioral approach to management, which stresses group dynamic and leadership, social needs as primary motivating factors, and focuses more on the human side of an organization.