Looking back through the elementary types, we see the infantile images together with those non-moral origins that psychoanalysis discovers in us; looking forward we notice thoughts directed to certain goals that will be mentioned later. The elementary types themselves thanks to intro-determination represent however a collection of our spiritual powers, which we have first formed and exercised at the time that the images arose, and which are in their nature closely related to these images, indeed completely united with them as a result of the errors of superposition—this collection of powers, I say, accompanies us through our entire life and is that from which are taken the powers that will be required for future development. The objects or applications change, the powers remain almost the same. The symbolism of the material categories which depends on external things changes with them; but the symbolism of the functional categories, which reflects these powers remains constant. The types with their intro-determination belong to the functional categories; and so they picture the constant characters. That experience to which the suggestions of symbolism (brought to verbal expression by means of introversion) point as to a possible spiritual development, corresponds to a religious ideal; when intensively lived out this development is called mysticism. [We can define mysticism as that religious state which struggles by the shortest way towards the accomplishment of the end of religion, the union with the divinity; or as an intensive cultivation of oneself in order to experience this union.] It presents itself if instead of looking backward we gaze forward from our elementary types to the beyond. But let us not forget that we can regard mysticism only as the most extreme, and therefore psychically the most internal, unfolding of the religious life, as the ideal which is hardly to be attained, although I consider that much is possible in this direction. If my later examination carries us right into the heart of mysticism, without making the standpoint clear every time, we now know what restrictions we must be prepared for.