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

-David Bednar 

Choosing the right will bring you happiness. It will bring you happiness because you are bringing another happiness or just because of the fact that you choose right over wrong. Choosing the right will never make you feel ashamed of yourself. It will increase your self esteem and make you wanna choose the right always. Obedience means to follow the rules always, in order to achieve happiness you need to be obedient. When you start being obedient you'll notice the difference.