Carl Jung and The Most Important Rule of Life

Fairy tales don’t deliver a single, timeless moral rule—often they contradict themselves on purpose. Marie-Louise von Franz, drawing on years of interpreting folk stories across cultures and eras, called this pattern the “rule of contradiction”: for nearly every message about how to respond to evil or moral danger, another tale offers the opposite instruction. One story says to fight evil; another says to run away. Some advise suffering without striking back; others urge retaliation. Even when the subject is lying, some tales recommend deception to escape harm while others insist on honesty—even toward the Devil. The result is unsettling: the “lessons” aren’t indisputable.

Von Franz’s disappointment turns into a deeper claim about human development. Contradictory ethical material, she argues, is exactly what makes individuality possible. Life presents countless predicaments with no one-size-fits-all solution. When a person must choose between competing ways of handling an ethical dilemma, the act of choosing—rather than following a single universal script—becomes the mechanism by which a responsible, free consciousness forms. In her framing, individuality would not exist if the underlying moral material were not internally opposed; the “terrible truth” of contradiction becomes the condition for genuine personal agency.

Yet one exception never appears in fairy tales: harming the helpful animal. That recurring motif functions as a practical moral compass. Von Franz interprets the helpful animal as the intuitive inner voice that steers a person toward right and away from wrong. Jung’s language for this inner steering system is conscience. Etymologically, conscience is tied to “knowledge” or “consciousness,” specifically a certainty about the emotional value of one’s motives—so it often shows up as gut feelings and strong emotions that pull someone toward certain actions and away from others. Cultures may describe conscience as an expression of God’s will, and Jung notes that obeying it is straightforward when its demands match social ethics and family or peer expectations. The trouble begins when conscience conflicts with the moral code of the group.

In those moments, Jung emphasizes that conscience commands the individual to obey the inner voice even at the risk of going astray. People can refuse that command by appealing to conventional morality, but the refusal tends to leave an inner residue: a whisper that something is “not right,” even when public opinion supports the person’s righteousness. That inner conflict is portrayed as psychologically costly—guilt, regret, shame, and a sense of being an imposter that can become a “sickness” of the self.

Still, conscience isn’t automatically reliable. Jung warns of a “false” conscience that can twist evil into good with the same emotional intensity as the “right” kind. To avoid being seduced by that counterfeit, Jung recommends slowing down in difficult dilemmas and resisting haste—“All haste is of the Devil.” With time to “stew” in moral conflict, an inner line of clarity can emerge, though certainty about being right is never guaranteed. The final demand is a leap of faith: follow conscience even when it may alienate others, because the peace gained by living in accordance with one’s deeper contract with life outweighs the social discomfort of being judged for it.