“Each of you,” he said, “has probably met in life people of one and the same type. Such people often even look like one another, and their inner reactions to things are exactly the same. What one likes the other will like. What one does not like the other will not like. You must remember such occasions because you can study the science of types only by meeting types. There is no other method. Everything else is imagination. You must understand that in the conditions in which you live you cannot meet with more than six or SEVEN TYPES although there are in life a greater number of fundamental types. The rest are all combinations of these fundamental types.” Fragments: Twelve

“But if there are no more than SEVEN TYPES around us, why can we not know them, that is, know what is the chief difference between them, and, when meeting them, be able to recognize and distinguish them?” said one of us. Fragments: Twelve