"You cannot do wrong and feel right. It is impossible." - Ezra T. Benson

I think that this statement means that when you do wrong, you can never feel right about that. 

If you do something bad then that makes you feel bad on the inside. When you do good then 

that lifts your spirits up and you feel good. An example of this is that if you do drugs or hurt 

someone, then that makes you feel bad . Doing the opposite however, such as helping people

or not lying to your parents can help you feel good about yourself. if you decide to choose

the wrong then you choose to feel bad. There is no way you can feel good about doing wrong.