“When I do good, I feel good. When I do bad, I feel bad.”

Abraham Lincoln

I think what this quote is trying to say is that when you commit good things you feel good inside and perhaps proud of yourself, but if you do something bad, you feel terrible inside. So if you want to feel good all the time you should do good things that will benefit you in some way. If you do something wrong, consequences will come to you. When you do something bad, you know its bad so why do it?