That part caught my attention as well. There's a danger in the seductive whisper of "you need more". Whether it's material goods, power, fame, or whatever else, pursuing external things like these is a hole which can never be filled. It seems to me that true happiness is to be found inward. If you can learn to find happiness where you are right now, then you can have a good life regardless of your external circumstances.
I had two really powerful insights when I was a teenager. The first was when I got a Christmas gift I really wanted (a walkman iirc), and it struck me that actually having it didn't fulfill me nearly as much as I had thought it would. The other was when my grandpa died, and I would have given anything to have him back (and I still would). These two experiences made me realize that stuff is hollow and unimportant, and what truly matters in this world are people. Being with the people you love is the greatest thing we can have, and unlike material possessions can never be replaced once it's gone.
I think that a simple life is far underrated. If all I ever do is spend time with my family and friends, and make the world around me just a bit better in some small way, I feel like that's enough.