A form of intellectual productiveness, therein lies its peculiar charm. Intellectual productiveness is one of the greatest joys – if not the greatest one – of human existence. It is not everyone who can write a play, or build a bridge, or even make a good joke. But in chess everyone can, everyone must be intellectually productive, and so can share in this select delight. I have always a slight feeling of pity for the man who has no knowledge of chess, just as I would pity the man who has remained ignorant of love. Chess, like love, like music, has the power to make men happy.