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

Ezra T. Benson states this, you cannot do wrong and feel right. When doing wrong you're going to feel wrong. When doing right you are going to feel right. For example, if  you take a test and copy off of someone's paper of course you're going to get a good grade, but then you feel bad because you the grade you didn't deserve. Or doing something you shouldn't have done you don't feel right. It's impossible to feel right. You feel guilt because you didn't do something right. Telling the truth is one part about feeling right. If you don't tell the truth you're going to feel guilty because you lied to someone, but if you tell the truth you feel right because you were being honest. Doing wrong and feeling right is not the best combination. Do right and feel right.