When you're satisfied in your job and feel you are being professionally challenged and adequately rewarded, you likely have a tendency to be fully engaged in your work. On the other hand, if you are unhappy in your role, feel you are not being adequately utilized, or feel under-compensated for your contributions, you may withdraw into yourself and not perform to your full ability. How you feel about your job, your boss and your colleagues is directly linked to what you are physically and mentally able to bring to your position.