Rummaging through my files, I found this ...
Harold Begbie, British author and journalist quoted Shackleton as saying, "Life to me means the greatest of all games. The danger lies in treating it as a trivial game, a game to be take lightly, and a game in which the rules don't matter much. The rules matter a great deal. The game has to be played fairly, or it is no game at all. And even to win the game is not the chief end. The chief end is to win it honorably and splendidly. To this chief end several things are necessary, Loyalty is one. Discipline is another. Unselfishness is another. Courage is another. Optimism is another. And chivalry is another.