C.G. Jung, in his work "The Undiscovered Self," reflects on the dualities that define human existence. He emphasizes that life is characterized by contrasting forces such as day and night, joy and suffering, and good and evil. These opposites coexist and create a complex landscape of human experience, where certainty about the triumph of one over the other is elusive.

Jung suggests that life resembles a battleground where these opposing elements continuously interact. The struggle between joy and pain, as well as good and evil, shapes our reality. He points out the deep uncertainty we face regarding which side will ultimately prevail, highlighting the inherent complexities of the human condition.