Short Term Trading (Australia Day) Weekend Lounge: 25-28 Jan, page-122

It doesn't matter how long you've been around ,how good you are ,how well informed you are and how disciplined you are you can always still do something stupid. The funny thing about mistakes in the market are that you really know in your heart that it's a mistake when you're doing it , the battle at the edges of fear and greed generally test the control of your emotions , the critical factor in rational decision making.

So you give yourself a slap shake your head at how stupid you were and get on with it.