Do you ever feel a nagging sense of discomfort when your actions don't match your beliefs? For example, you might tell a small white lie even though you value honesty. That uneasy feeling is known as ...

"I prefer to rely on my memory. I have lived with that memory a long time, I am used to it, and if I have rearranged or distorted anything, surely that was done for my own benefit." (Leon Festinger, ...