This thinker argued that an individual's psychological change from an impure soul to a perfected soul is a parallel to transforming lead into gold in his work Psychology and Alchemy. This man described his creative method of "active imagination" in his Red Book, and he examined the relationship between coincidences in his work Synchronicity. This psychologist developed the idea of the "shadow," "anima," and "persona," and the Myers-Briggs Type Indicator is based off of this man's research on introversion, extroversion, 
This thinker argued that an individual's psychological change from an impure soul to a perfected soul is a parallel to transforming lead into gold in his work Psychology and Alchemy. This man described his creative method of "active imagination" in his Red Book, and he examined the relationship between coincidences in his work Synchronicity. This psychologist developed the idea of the "shadow," "anima," and "persona," and the Myers-Briggs Type Indicator is based off of this man's research on introversion, extroversion, and archetypes. For 10 points, name this Swiss psychologist who developed the idea of the collective unconscious.
This thinker argued that an individual's psychological change from an impure soul to a perfected soul is a parallel to transforming lead into gold in his work Psychology and Alchemy.
Carl Jung