Capricorn

On the outside : On the The Capricorn personality is very grounded in reality; it's the rock that everyone else loves to lean on. For the most part, Capricorns are quietly strong-willed and self-assured. They truly know who they are, so they are comfortable in any social situation they choose to participate in. Although Caps sometimes have a reputation as being a bit stodgy, they often astound their companions with their sharp and sudden wit.

On the inside : Caps are highly dependable, yet they can still suffer inwardly from mood swings that carry them from the heights of euphoria to bouts of depression. In most cases, they are adept at concealing these conflicting moods in public. It is only their closest friends and family that are given a glimpse of this inner turmoil.

Capricorn on the outside is a cool, calm.

Capricorn is inwardly quite warm and sympathetic, often with a surprisingly quick wit.

WOW?!
serious, it's quite true? hmmm..