“Deciding on the right thing to do in a situation is a bit like deciding on the right thing to wear to a party. It is easy to decide on what is wrong to wear to a party, such as deep-sea diving equipment or a pair of large pillows, but deciding what is right is much trickier. The truth is that you can never be sure if you have decided on the right thing until the party is over, and by then it is too late to go back and change your mind, which is why the world is filled with people doing terrible things and wearing ugly clothing.”