If you don't like your lifestyle, look at your results.
If you don't like your results, look at your actions.
If you don't like your actions, look at your attitude.
If you don't like your attitude, look at your philosophy.
If you think about it, the above quote screams a few things at me.
1. Self reliance. Notice that he didn't say, "If everyone at work and home are cheery and supportive, I can succeed." YOU are the only one who can create success for you.
2. Focus on the solution. Don't listen to the water cooler whiners who are focused on the problems or talk about how unfair things are. Focus on the solution!
3. Understand that direction and belief are the genesis of greatness. Figuring out why you are committed to something is more important than the action steps at the beginning of something. A lot of times people like to be "busy" doing something without having the "big picture" of what they are going toward. Take some time and focus on the why!