My analysis of this soul, the human psyche, leads me to believe that man is not truly one, but truly two. One of him strives for the nobilities of life; this we call the good self. The other seeks an expression of impulses that bind him to some dim animal relation with the earth; this we may call the bad. These two carry on an eternal struggle in the nature of man, yet they are chained together. That chain spells repression to the evil, remorse to the good. Now, if these two selves could be separated from each other, how much free-er the good in us would be; what heights it might scale? And the so called evil, once liberated, would fulfill itself and trouble us no more.
from: Dr. Jekyll and Mr. Hyde (1931)
Fredric March acted as Dr. Henry Jekyll