Mining the Mind.

For the mind is the one gift of the gods which man can call his own. He may have to say what he's told to say, but he can think what he likes. He can live in his mind, he can share it, he can speak it (if he's rich enough), he can give it away, or he can sell it for a crust. He can feed it on wisdom or wish-wash, humour or husks, triumph or tripe. He can listen to it or talk it to death. He can use it for prophecy or profitry. He can lift himself with it or down himself by it.