Travelling on London's underground system is usually the fastest way of getting across town, if not the most enjoyable, but when there aren't any suicides or service delays to write about, the staff in many of the stations do try to brighten up the day by using their whiteboards for what they hope will be more thought-provoking messages.  This one was at Canary Wharf yesterday.  Confucius is also reported to be the originator of this advice which I've always tried to follow: "Choose a job you love and you will never have to work a day in your life."  Xièxie.