The inner and the outer are complimentary aspects of the very same thing which exist in order to keep each other in balance.
According to Jung, each of us entertains essentially two personalities. The first and most obvious is the persona which is the commonly known personality that we project outwards and by which everyone knows us. The second and less known (and even less obvious) is the anima (for a man) and animus (for a woman). The inner and the outer personalities are complimentary. Men entertain an aggressive, macho, daring attitude which is balanced by the softer more emotional feminine attitude. Woman seem to be softer and effeminate on the outside, but more often than not they are solid and perseverance attitudes which keep them going in an insane world. Men like to act tough but cry on the inside, and women seem to get all emotional and teary while becoming stronger on the inside because of their ability to release inner tensions.
[Soul as anima]
"As to the character of the anima, my experience confirms the rule that is is, by and large, complementary to the character of the persona. The anima usually contains all those common human qualities which the conscious attitude lacks."
-- Carl Jung.