Obedience
                     "Obedience is central to becoming, being, and remaining happy." 

Well what this quote means is that is you obey your life must be filled with lots of joy and great things but it saying to be respectful and helpful and thankful to the things you have and have received for being obedient and well behaved and obedience can be many things so its not just one thing's it many things that what that quote means in my opinion.