After we make a decision, we often tell ourselves a story about why our choice was the right one to make. It's a mental process that psychologist Elliot Aronson calls self-justification. These rationalizations can sometimes lead us to excuse bad behavior or talk ourselves out of a poor choice. But are there also times when self-justification can be used for good? 

This is the second part of our series on cognitive dissonance. Listen to the first episode: How We Live with Contradictions.