"You can't be right by doing wrong; 
you can't be wrong by doing right."
~Thomas S. Monson


This quote speaks the truth. Right is right and wrong is wrong. You can not do the wrong thing and feel right about it. That's just not right. Even though you choose to do the wrong thing at the moment and you feel and think it was the right thing to do you eventually will feel the guilt that your holding within. And of not then that one wrong act eventually will get you back somehow. And you would be hit by bad karma. In the other hand when you choose to do the right thing you will never feel like you did the wrong thing. For example lets say that you broke something in your house and your parent asks you if you were the one who broke it you may feel a bit of guilt at the moment but once you confessed your mistake you will realize that you don't have to deal with the guilt inside of you that you have been holding in. You'll realize that it was the right thing to do  and you'll feel good about it.