When a person thinks, that is another kind of action. At that time he controls his mind, either consciously or unconsciously, and directs it according to his own will. He becomes reasonable, exact, and thoughtful. Both an imaginative and a thinking person may go to extremes and may fail; but keeping the balance is what brings about desired results. A thinking person, also, may think so hard that he becomes confused by his own thoughts. There are many thinkers who think so hard that they become thoughtless.