The meaning of commitment is being dedicated to an activity or hobby.  Once you are dedicated you are willing to do whatever it takes to full fill the needs of that one thing.  In some cases people do not realize what that means.  In the work place you have to be committed.  It is not a choice; you have to be willing to drop everything just to make your boss happy.  Calling out multiple times for six different illnesses or symptoms in two weeks is quite pathetic.  Then calling your co-worker for extra hours is insane.  If you are not committed then I would either look for another job or quit before you get fired.  Secondly if you cannot put in the time and effort for this job and you think you do not need this job.  Well you are wrong; this job does not need you.  They can easily replace you in a blink of an eye.  So do not cry or be disappointed when they fire you.  You cannot be mad at them but only yourself.  You did it to yourself so grow up and carry on with life.  Next time you think about getting another job try to fix your mistakes and figure out if you have the time to commit to it.