Every life must be driven by ambition. Yet everybody must also lead a whole life in perfect contentment. There is a natural tension between ambition and contentment. Sometimes the balance tips towards ambition, especially when one is younger. At other times, especially when one is older, the balance tips towards contentment. At the end of any life, the cup of accomplishment and contentment are both half full. The epitaphs and eulogies thereafter are based on the half-full cups of what has been accomplished. The empty half cups of non-accomplishment are interred with the person's ashes.