When describing extraverted thinking, I gave a brief characterization of introverted thinking, to which at this stage I must make further reference. Introverted thinking is primarily orientated by the subjective factor. At the least, this subjective factor is represented by a subjective feeling of direction, which, in the last resort, determines judgment. Occasionally, it is a more or less finished image, which to some extent, serves as a standard. This thinking may be conceived either with concrete or with abstract factors, but always at the decisive points it is orientated by subjective data. Hence, it does not lead from concrete experience back again into objective things, but always to the subjective content. External facts are not the aim and origin of this thinking, although the introvert would often like to make it so appear. It begins in the subject, and returns to the subject, although it may undertake the widest flights into the territory of the real and the actual.