One is the idea of the unconscious mind.

VOA: special.2010.04.13

Freud believed that literature and fairy tales and stories to children and the like carried certain universal themes, certain aspects of unconscious struggles, and certain preoccupations of our unconscious mind.

弗洛伊德认为文学作品，童话故事,儿童读物之类的东西,都含有某个一般性的主题，某些方面的无意识冲突，以及某种无意识偏见。

耶鲁公开课 - 心理学导论课程节选