" I have some rules of my own. One of them is never to regret anything. Over time, I came to the conclusion that this was the right thing to do. As soon as you start regretting and looking back, you start to sour. You always have to think about the future. You always have to look ahead. Of course you have to analyze your past mistakes, but only so that you can learn and correct the course of your life.   "

― Vladimir Putin , First Person: An Astonishingly Frank Self-Portrait by Russia's President