We have, therefore, two kinds of thinking: directed thinking, and dreaming or fantasy-thinking. The former operates with speech elements for the purpose of communication, and is difficult and exhausting; the latter is effortless, working as it were spontaneously, with the contents ready to hand, and guided by unconscious motives.
Jung establishes the foundational binary between directed thinking and fantasy thinking, defining the latter as effortless, spontaneous, and governed by unconscious rather than adaptive aims.
, Symbols of Transformation, 1952thesis