The reality is that our choices are unstable!

"People also believe that choices are dispositional. That is to say, they reflect the underlying nature of the person making the choice, rather than the situation in which the person finds himself. We have previously discussed the fact that we all tend to believe that other people’s actions reflect their ‘personality’ or underlying disposition, whereas we believe our own actions are the result of the situation in which we find ourselves (the fundamental attribution error). We tend to see choices in exactly the same way. Since we tend to believe that choices reflect underlying nature, we expect them not to change. However, the reality is that our choices are unstable, shifting upon visceral influences."